ci: Don't set `compiler-builtins-no-f16-f128` #1634

Job	Run time
build (--std-tests)	1m 59s
build (--test-libcore)	48s
build (--test-successful-rustc --nb-parts 2 --current-part 0)	1m 34s
build (--mini-tests)	50s
build (--test-successful-rustc --nb-parts 2 --current-part 1)	48s
success_gcc12	2s
	6m 1s

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