fix(dbutils): accept pathlib.Path arguments in fs methods

[nileshpatil6]

Fixes #1459

dbutils.fs methods only accepted plain strings, so passing a pathlib.Path failed even though Path is idiomatic in modern Python.

What changed

Added a small _as_str helper in databricks/sdk/dbutils.py that converts a Path to str and leaves strings untouched. Called it at the entry of every _FsUtil method that takes a path argument (ls, cp, mv, rm, mkdirs, head, put, mount, unmount, updateMount).

Tests

Added 7 unit tests (one per patched method) that pass a Path object and assert the underlying API is still called with a plain string.

Signed-off-by: nileshpatil6 technil6436@gmail.com

[GodNooNoo]

@nileshpatil6 any updates here?

[github-actions]

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Trigger:
go/deco-tests-run/sdk-py

Inputs:

• PR number: 1461
• Commit SHA: 109e64d1084598ccae568753f064597dda3abf22

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[nileshpatil6]

Hey, sorry for the delay. The branch had gone stale, upstream removed NEXT_CHANGELOG.md (and its workflow) in the v0.117.0 release, which is what caused the merge conflict. I've merged the latest main and dropped the changelog hunk since that whole mechanism is gone now. The diff is back to just the two files: dbutils.py and its tests. Reran the full tests/test_dbutils.py suite locally, 26/26 pass, and ruff format/lint (pinned 0.5.6) are clean. Worth noting per the updated CONTRIBUTING.md this repo is now a read-only mirror, so even once approved a maintainer re-applies the change internally and it ships with a release rather than merging here directly.