ci: Don't set `compiler-builtins-no-f16-f128` #1640

Job	Run time
build (--mini-tests)	1m 43s
build (--std-tests)	50s
build (--test-successful-rustc --nb-parts 2 --current-part 0)	2m 16s
build (--test-libcore)	1m 3s
build (--test-successful-rustc --nb-parts 2 --current-part 1)	1m 2s
success_gcc12	4s
	6m 58s

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