Tests

Implement head resizing (and reversal) for larrow/rarrow/darrow #29533

Job	Run time
Python 3.11 on ubuntu-22.04	16m 15s
Python 3.13 on ubuntu-22.04 (Extra TeX packages)	18m 4s
Python 3.13t on ubuntu-22.04 Free-threaded	16m 51s
Python 3.13 on macos-14	17m 0s
Python 3.12 on ubuntu-24.04	16m 10s
Python 3.12 on macos-14	17m 19s
Python 3.12 on ubuntu-22.04-arm	10m 36s
Python 3.11 on ubuntu-22.04 (Minimum Versions)	17m 18s
Python 3.11 on macos-13	26m 37s
Create issue on failure	0s
	2h 36m 10s

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