Exclude tests from incremental builds

[mshustov]

Summary

part of #90281
Cold run before: 6m 31sec
Cold run after: 5m 2sec

This PR adds a centralized tsconfig.projects.json for all the plugins and excludes all the test files from being compiled when building TS project references.
Instead, I merged x-pack/tsconfig.json into tsconfig.json to keep the single project containing all the test files.
Since we have the single tsconfig file, I moved all the typings to the root level as well.

I made several changes to reduce the number of patterns to exclude:

• src/core: test_types.ts renamed to types.test.ts
• home: /mocks/index.ts renamed to mocks.ts
• management: /mocks/index.ts renamed to mocks.ts
• spaces_oss: /mocks/index.ts renamed to mocks.ts
• canvas: test_helpers.tsx moved under test_helpers folder
• enterprise_search: shared_columns_test.tsx renamed to shared_columns.mock.tsx
• infra: remove unused enzyme_helpers
• rollup and watcher: move client_integration under __jest__ folder for consistency with other ES-UI proejcts
• ui_actions_enhanced: renames test_data.tsx to mocks.tsx
• uptime: move test helpers to /lib/mocks
• converted several canvas utils from js into ts
• remove @ts-expect-error when plugin imported unknown type. It doesn't make sense as a type inferred as any.

[spalger]

Chatted with @tylersmalley and we agree that this is less than ideal and but we don't need to block this PR and we can try to get things better organized as we move to Bazel. This optimization might degrade over time, but ultimately it shouldn't break anything so 👍

[kibanamachine]

💔 Build Failed

• continuous-integration/kibana-ci/pull-request
• Commit: d8af9f0
• Storybooks Preview
• Pipeline Steps (look for red circles / failed steps)
• Interpreting CI Failures

Failed CI Steps

• Execute xpack-securitySolutionCypressChrome
• Check TypeScript Projects
• Lint: eslint

Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
uptime	603	602	-1

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
uptime	939.5KB	939.1KB	-466.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
canvas	548.9KB	549.4KB	+553.0B

History

• 💔 Build #112931 failed abbe580
• 💔 Build #111611 failed 3adc66b
• 💔 Build #111370 failed 33260a2
• 💔 Build #111351 failed 5b8f63e

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[mshustov]

closed in favour of #95610