Normalize output paths when downloading files

[pietern]

Changes

The "bundle generate" suite of commands generate bundle configuration and download relevant files from the workspace to the local file tree. Some paths that are valid in the Databricks workspace are not valid on Windows. This change normalizes path components to always be Windows-compatible.

Why

Fix the class of issues demonstrated by #2528.

Tests

• New unit tests.
• Manually confirmed that running "bundle generate" for a pipeline with a source file that includes incompatible characters now works as expected on Windows.

[github-actions[bot]]

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[eng-dev-ecosystem-bot]

Run: 18460977825

	Env	🔄​flaky	✅​pass	🙈​skip
✅​	aws linux		322	545
✅​	aws windows		323	544
✅​	aws-ucws linux		438	441
🔄​	aws-ucws windows	2	437	440
✅​	azure linux		322	544
✅​	azure windows		323	543
✅​	azure-ucws linux		438	440
✅​	azure-ucws windows		439	439
🔄​	gcp linux	3	318	546
✅​	gcp windows		322	545

Test Name	aws-ucws windows	gcp linux
TestAccept	✅​p	🔄​f
TestAccept/bundle/templates/default-python/integration_classic	✅​p	🔄​f
TestAccept/bundle/templates/default-python/integration_classic/DATABRICKS_BUNDLE_ENGINE=terraform/UV_PYTHON=3.11	✅​p	🔄​f
TestFsCpFileToDir	🔄​f	✅​p
TestFsCpFileToDir/local_to_uc-volumes	🔄​f	🙈​s