[ObsUX][APM] Migrate Service Overview archiver test cases to synthtra…

…ce (elastic#201407)

Part of elastic#193245
Related elastic#200226
Closes elastic#200743 

## Summary

This PR completes the migration of remaining Service Overview tests to
the Deployment Agnostic test framework. In this PR, one test was
deduplicated (the Dependencies test), and the Instances Detailed
Statistics cases dealing with archiver data was migrated to make use of
synthtrace instead. Snapshots included were redone to match the data
generated by synthtrace, but no other cases were changed to ensure the
new migrated tests were passing the same assumptions as before.

## How to Test

### Serverless

```
node scripts/functional_tests_server --config x-pack/test/api_integration/deployment_agnostic/configs/serverless/oblt/apm.serverless.config.ts
node scripts/functional_test_runner --config x-pack/test/api_integration/deployment_agnostic/configs/serverless/oblt.apm.serverless.config.ts
```

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.apm.stateful.config.ts
node scripts/functional_test_runner --config x-pack/test/api_integration/deployment_agnostic/configs/stateful/oblt.apm.stateful.config.ts
```

---------

Co-authored-by: jennypavlova <[email protected]>
Co-authored-by: Elastic Machine <[email protected]>

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

@@ -11,7 +11,6 @@ export default function ({ loadTestFile }: DeploymentAgnosticFtrProviderContext)
   describe('custom_dashboards', () => {
     loadTestFile(require.resolve('./dependency_metrics.spec.ts'));
     loadTestFile(require.resolve('./metadata.spec.ts'));
-    loadTestFile(require.resolve('./service_dependencies.spec.ts'));
     loadTestFile(require.resolve('./top_dependencies.spec.ts'));
     loadTestFile(require.resolve('./top_operations.spec.ts'));
     loadTestFile(require.resolve('./top_spans.spec.ts'));