Find All References may fail to find references after a rename

[sean-mcmanus]

1. Do a Find All Refs (note the number found).
2. Do a Rename with files.refactoring.autoSave set to false.
3. Wait for any tag parsing to finish.
4. Do a Find All Refs on the new name.

Bug: Somewhat randomly, the Find All Refs will be missing results, i.e. the database is not in a valid state and is missing the symbols for certain files. The database appears to become updated/correct after the files with missing references are opened or somehow have their file tag parsed again.

I repro it in 1.20.5 to 1.21.1+.

[sean-mcmanus]

@browntarik I still repro this issue.