ota: Import One True Awk from 20240122 (6a07a6d3bb63)

ota: Import One True Awk from 20240122 (6a07a6d3bb63)

Jan 22, 2024:
        Restore the ability to compile with g++. Thanks to
        Arnold Robbins.

Dec 24, 2023:
        Matchop dereference after free problem fix when the first
        argument is a function call. Thanks to Oguz Ismail Uysal.
        Fix inconsistent handling of --csv and FS set in the
        command line. Thanks to Wilbert van der Poel.
        Casting changes to int for is* functions.

Nov 27, 2023:
        Fix exit status of system on MacOS. Update to REGRESS.
        Thanks to Arnold Robbins.
        Fix inconsistent handling of -F and --csv, and loss of csv
        mode when FS is set.

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