Incorrect regex pattern in regex_replace_posix_groups #19766
Description
Describe the bug
The regex_replace_posix_groups method should replace patterns like \4 with ${4} but it's using the pattern (\\)(\d*) instead of (\\)(\d+).
To Reproduce
I added a test in the fix PR which replaces some pattern with "\", currently this produces "${}" which is how I came across this bug.
Expected behavior
Should just replace the pattern with ""
Additional context
No response