chore: use cc instead of hardcoding compiler #1431

Job	Run time
prepare	8s
build (php-8-2-24-alpine, linux/amd64)	13m 42s
build (php-8-2-24-alpine, linux/386)	12m 11s
build (php-8-2-24-alpine, linux/arm/v7)	47m 41s
build (php-8-2-24-alpine, linux/arm64)	52m 30s
build (php-8-2-24-bookworm, linux/amd64)	4m 41s
build (php-8-2-24-bookworm, linux/386)	4m 4s
build (php-8-2-24-bookworm, linux/arm/v7)	19m 53s
build (php-8-2-24-bookworm, linux/arm64)	19m 59s
build (php-8-3-12-alpine, linux/amd64)	12m 6s
build (php-8-3-12-alpine, linux/386)	11m 50s
build (php-8-3-12-alpine, linux/arm/v7)	47m 12s
build (php-8-3-12-alpine, linux/arm64)	1h 2m 58s
build (php-8-3-12-bookworm, linux/amd64)	4m 42s
build (php-8-3-12-bookworm, linux/386)	4m 5s
build (php-8-3-12-bookworm, linux/arm/v7)	16m 46s
build (php-8-3-12-bookworm, linux/arm64)	20m 6s
push	0s
	5h 54m 34s

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