[APM] Migrate latency API tests to be deployment-agnostic (elastic#19…

…9802)

### How to test
Closes elastic#198978
Part of elastic#193245

This PR contains the changes to migrate `latency` test folder to
deployment-agnostic testing strategy.

### How to test


- Serverless

```
node scripts/functional_tests_server --config x-pack/test/api_integration/deployment_agnostic/configs/serverless/oblt.serverless.config.ts
node scripts/functional_test_runner --config x-pack/test/api_integration/deployment_agnostic/configs/serverless/oblt.serverless.config.ts --grep="APM"
```

It's recommended to be run against
[MKI](https://github.com/crespocarlos/kibana/blob/main/x-pack/test_serverless/README.md#run-tests-on-mki)

- Stateful
```
node scripts/functional_tests_server --config x-pack/test/api_integration/deployment_agnostic/configs/stateful/oblt.stateful.config.ts
node scripts/functional_test_runner --config x-pack/test/api_integration/deployment_agnostic/configs/stateful/oblt.stateful.config.ts --grep="APM"
```

## Checks

- [ ] (OPTIONAL, only if a test has been unskipped) Run flaky test suite
- [x] local run for serverless
- [x] local run for stateful
- [x] MKI run for serverless

x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/index.ts

@@ -22,6 +22,7 @@ export default function apmApiIntegrationTests({
     loadTestFile(require.resolve('./correlations'));
     loadTestFile(require.resolve('./entities'));
     loadTestFile(require.resolve('./cold_start'));
+    loadTestFile(require.resolve('./latency'));
     loadTestFile(require.resolve('./infrastructure'));
   });
 }

x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/latency/index.ts

@@ -0,0 +1,15 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { DeploymentAgnosticFtrProviderContext } from '../../../../ftr_provider_context';
+
+export default function ({ loadTestFile }: DeploymentAgnosticFtrProviderContext) {
+  describe('latency', () => {
+    loadTestFile(require.resolve('./service_apis.spec.ts'));
+    loadTestFile(require.resolve('./service_maps.spec.ts'));
+  });
+}

x-pack/test/apm_api_integration/tests/latency/service_apis.spec.ts → x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/latency/service_apis.spec.ts

@@ -12,12 +12,12 @@ import { isFiniteNumber } from '@kbn/apm-plugin/common/utils/is_finite_number';
 import { ApmDocumentType } from '@kbn/apm-plugin/common/document_type';
 import { RollupInterval } from '@kbn/apm-plugin/common/rollup';
 import { ProcessorEvent } from '@kbn/observability-plugin/common';
-import { FtrProviderContext } from '../../common/ftr_provider_context';
+import { ApmSynthtraceEsClient } from '@kbn/apm-synthtrace';
+import { DeploymentAgnosticFtrProviderContext } from '../../../../ftr_provider_context';
 
-export default function ApiTest({ getService }: FtrProviderContext) {
-  const registry = getService('registry');
-  const apmApiClient = getService('apmApiClient');
-  const apmSynthtraceEsClient = getService('apmSynthtraceEsClient');
+export default function ApiTest({ getService }: DeploymentAgnosticFtrProviderContext) {
+  const apmApiClient = getService('apmApi');
+  const synthtrace = getService('synthtrace');
 
   const serviceName = 'synth-go';
   const start = new Date('2021-01-01T00:00:00.000Z').getTime();
@@ -156,7 +156,13 @@ export default function ApiTest({ getService }: FtrProviderContext) {
   let latencyTransactionValues: Awaited<ReturnType<typeof getLatencyValues>>;
 
   // FLAKY: https://github.com/elastic/kibana/issues/177387
-  registry.when('Services APIs', { config: 'basic', archives: [] }, () => {
+  describe('Services APIs', () => {
+    let apmSynthtraceEsClient: ApmSynthtraceEsClient;
+
+    before(async () => {
+      apmSynthtraceEsClient = await synthtrace.createApmSynthtraceEsClient();
+    });
+
     describe('when data is loaded ', () => {
       const GO_PROD_RATE = 80;
       const GO_DEV_RATE = 20;

x-pack/test/apm_api_integration/tests/latency/service_maps.spec.ts → x-pack/test/api_integration/deployment_agnostic/apis/observability/apm/latency/service_maps.spec.ts

@@ -10,12 +10,12 @@ import { meanBy } from 'lodash';
 import { ApmDocumentType } from '@kbn/apm-plugin/common/document_type';
 import { RollupInterval } from '@kbn/apm-plugin/common/rollup';
 import { ProcessorEvent } from '@kbn/observability-plugin/common';
-import { FtrProviderContext } from '../../common/ftr_provider_context';
+import { ApmSynthtraceEsClient } from '@kbn/apm-synthtrace';
+import { DeploymentAgnosticFtrProviderContext } from '../../../../ftr_provider_context';
 
-export default function ApiTest({ getService }: FtrProviderContext) {
-  const registry = getService('registry');
-  const apmApiClient = getService('apmApiClient');
-  const apmSynthtraceEsClient = getService('apmSynthtraceEsClient');
+export default function ApiTest({ getService }: DeploymentAgnosticFtrProviderContext) {
+  const apmApiClient = getService('apmApi');
+  const synthtrace = getService('synthtrace');
 
   const serviceName = 'synth-go';
   const start = new Date('2021-01-01T00:00:00.000Z').getTime();
@@ -73,7 +73,14 @@ export default function ApiTest({ getService }: FtrProviderContext) {
 
   let latencyMetricValues: Awaited<ReturnType<typeof getLatencyValues>>;
   let latencyTransactionValues: Awaited<ReturnType<typeof getLatencyValues>>;
-  registry.when('Service Maps APIs', { config: 'trial', archives: [] }, () => {
+
+  describe('Service Maps APIs', () => {
+    let apmSynthtraceEsClient: ApmSynthtraceEsClient;
+
+    before(async () => {
+      apmSynthtraceEsClient = await synthtrace.createApmSynthtraceEsClient();
+    });
+
     describe('when data is loaded ', () => {
       const GO_PROD_RATE = 80;
       const GO_DEV_RATE = 20;