ci: improve static build steps (#305) #438

Job	Run time
prepare	11s
build (php-8-2-alpine, linux/amd64)	2m 57s
build (php-8-2-alpine, linux/386)	3m 6s
build (php-8-2-alpine, linux/arm/v6)	14m 29s
build (php-8-2-alpine, linux/arm/v7)	14m 32s
build (php-8-2-alpine, linux/arm64)	13m 6s
build (php-8-2-bookworm, linux/amd64)	2m 45s
build (php-8-2-bookworm, linux/386)	3m 3s
build (php-8-2-bookworm, linux/arm/v6)	15m 30s
build (php-8-2-bookworm, linux/arm/v7)	15m 5s
build (php-8-2-bookworm, linux/arm64)	13m 51s
build (php-8-3-rc-alpine, linux/amd64)	2m 38s
build (php-8-3-rc-alpine, linux/386)	2m 44s
build (php-8-3-rc-alpine, linux/arm/v6)	14m 16s
build (php-8-3-rc-alpine, linux/arm/v7)	14m 19s
build (php-8-3-rc-alpine, linux/arm64)	12m 50s
build (php-8-3-rc-bookworm, linux/amd64)	2m 44s
build (php-8-3-rc-bookworm, linux/386)	2m 49s
build (php-8-3-rc-bookworm, linux/arm/v6)	15m 39s
build (php-8-3-rc-bookworm, linux/arm/v7)	15m 22s
build (php-8-3-rc-bookworm, linux/arm64)	14m 14s
push (php-8-2-alpine, builder)	10s
push (php-8-2-alpine, runner)	8s
push (php-8-2-bookworm, builder)	10s
push (php-8-2-bookworm, runner)	24s
push (php-8-3-rc-alpine, builder)	17s
push (php-8-3-rc-alpine, runner)	7s
push (php-8-3-rc-bookworm, builder)	18s
push (php-8-3-rc-bookworm, runner)	12s
	3h 17m 56s

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