Add ThreadSanitizer core dumping flags when we are ThreadSanitizer-clean

abort_on_error=1 disable_coredump=0 should be added to TSAN_OPTIONS_COMMON in the .gitlab-ci.yml when we are ThreadSanitizer-clean so we get GDB to analyze core dumps in TSAN CI jobs. (Originated here !2699 (comment 99092).)

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