worktree: Make expanded symlinks be indexed by default (#51382)

Closes #41887

This is a stable subset of other efforts to make symlink flows more
intuitive like #46344

Release Notes:

- Fixed expanded symlinks not being searchable
922b1b5126Andre Roelofs committed on 3/31/2026, 7:33:37 PM· committed by GitHubparent03c5d37
1 file changedLine totals unavailable