ci: Don't set `compiler-builtins-no-f16-f128` #1637

Job	Run time
build (--test-libcore)	1m 31s
build (--mini-tests)	1m 55s
build (--test-successful-rustc --nb-parts 2 --current-part 0)	2m 0s
build (--std-tests)	53s
build (--test-successful-rustc --nb-parts 2 --current-part 1)	48s
success_gcc12	4s
	7m 11s

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