Correctly resolve relative includes in databricks.yml from parent folders

[misha-db]

Changes

Correctly resolve relative includes in databricks.yml from parent folders

Closes: #1818
Closes: #1731

Tests

Unit tests in BundleFileSet.test.ts

[ilia-db]

Is it used anywhere now?

[misha-db]

Not used, removed

[ranasalalali]

Friendly nudge on this one — this fix for relative includes in databricks.yml from parent folders would be really useful. It looks like Linux is passing, Windows is failing, and integration tests may need the manual trigger. If someone from the team can take a look or help get the remaining checks unstuck, that’d be appreciated.

[mjestertea]

Hello

This addition would be a great to fix an issue with the functionality for many of the bundles

Thank you!

[github-actions]

If integration tests don't run automatically, an authorized user can run them manually by following the instructions below:

Trigger:
go/deco-tests-run/vscode

Inputs:

• PR number: 1870
• Commit SHA: 9555629616d5c496aa29f97297f153d4e3b58108

Checks will be approved automatically on success.

[rugpanov]

The PR fixes initial include resolution in BundleFileSet, but the extension's live refresh path still depends on BundleWatcher. So after startup or after touching databricks.yml, parent-folder includes can be merged correctly, but edits to those parent include files themselves won't be observed because BundleWatcher only watches under the active project root.

Detailed finding: parent-directory includes are now returned by BundleFileSet.getIncludedFiles() (BundleFileSet.ts:103-120), but BundleWatcher still only watches YAML files under activeProjectUri (BundleWatcher.ts:36-42). For the issue’s layout, folder/sub-folder/databricks.yml includes ../../dab/databricks-shared.yml; that shared file is outside activeProjectUri, so edits/creates/deletes there won’t fire yamlFileChangeHandler, won’t invalidate bundleDataCache, and won’t refresh targets/prevalidation state until the user reloads or touches the root bundle file. If this PR is adding support for parent-folder includes, the watcher should also cover those resolved include paths, or otherwise refresh from them.