Allow auto-indenting with syntax errors when using regex-based indent matches to improve bash auto-indent behavior (#24160)

- Fixes auto-indent issues around `elif` caused by auto-indent being prevented due to syntax errors generated before `elif` clause completed

Release Notes:

- Fixed an issue where inserting an elif before an else in bash would
not properly auto-indent

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Co-authored-by: Conrad Irwin <conrad@zed.dev>