[8.6] [ci] Increase FTR timeout (#148677) (#148688)

# Backport

This will backport the following commits from `main` to `8.6`:
- [[ci] Increase FTR timeout
(#148677)](#148677)

<!--- Backport version: 8.9.7 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT
[{"author":{"name":"Jon","email":"[email protected]"},"sourceCommit":{"committedDate":"2023-01-10T22:02:04Z","message":"[ci]
Increase FTR timeout (#148677)\n\nFTR groups on CI target a 40 minute
runtime. In situations where tests\r\nare updated or moved, and there's
no prior data, we're seeing occasional\r\ntimeouts with a 60 minute
timeout. This increases the timeout to
90\r\nminutes.","sha":"902f86a06616cc6324f40d38108f62653798a88c","branchLabelMapping":{"^v8.7.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["Team:Operations","release_note:skip","backport:prev-minor","v8.7.0"],"number":148677,"url":"https://github.com/elastic/kibana/pull/148677","mergeCommit":{"message":"[ci]
Increase FTR timeout (#148677)\n\nFTR groups on CI target a 40 minute
runtime. In situations where tests\r\nare updated or moved, and there's
no prior data, we're seeing occasional\r\ntimeouts with a 60 minute
timeout. This increases the timeout to
90\r\nminutes.","sha":"902f86a06616cc6324f40d38108f62653798a88c"}},"sourceBranch":"main","suggestedTargetBranches":[],"targetPullRequestStates":[{"branch":"main","label":"v8.7.0","labelRegex":"^v8.7.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/148677","number":148677,"mergeCommit":{"message":"[ci]
Increase FTR timeout (#148677)\n\nFTR groups on CI target a 40 minute
runtime. In situations where tests\r\nare updated or moved, and there's
no prior data, we're seeing occasional\r\ntimeouts with a 60 minute
timeout. This increases the timeout to
90\r\nminutes.","sha":"902f86a06616cc6324f40d38108f62653798a88c"}}]}]
BACKPORT-->

Co-authored-by: Jon <[email protected]>

.buildkite/pipeline-utils/ci-stats/pick_test_group_run_order.ts

@@ -446,7 +446,7 @@ export async function pickTestGroupRunOrder() {
                 ({ title, key, queue = defaultQueue }): BuildkiteStep => ({
                   label: title,
                   command: getRequiredEnv('FTR_CONFIGS_SCRIPT'),
-                  timeout_in_minutes: 60,
+                  timeout_in_minutes: 90,
                   agents: {
                     queue,
                   },