feat: thread autoscaling #2053

Job	Run time
prepare	12s
build (php-8-2-27-alpine, linux/amd64)	8m 41s
build (php-8-2-27-alpine, linux/386)	4m 26s
build (php-8-2-27-alpine, linux/arm/v7)	4m 19s
build (php-8-2-27-alpine, linux/arm64)	4m 21s
build (php-8-2-27-bookworm, linux/amd64)	8m 34s
build (php-8-2-27-bookworm, linux/386)	4m 27s
build (php-8-2-27-bookworm, linux/arm/v7)	7m 50s
build (php-8-2-27-bookworm, linux/arm64)	7m 29s
build (php-8-3-16-alpine, linux/amd64)	5m 13s
build (php-8-3-16-alpine, linux/386)	8m 8s
build (php-8-3-16-alpine, linux/arm/v7)	7m 37s
build (php-8-3-16-alpine, linux/arm64)	4m 26s
build (php-8-3-16-bookworm, linux/amd64)	7m 35s
build (php-8-3-16-bookworm, linux/386)	4m 22s
build (php-8-3-16-bookworm, linux/arm/v7)	6m 30s
build (php-8-3-16-bookworm, linux/arm64)	4m 25s
build (php-8-4-3-alpine, linux/amd64)	9m 6s
build (php-8-4-3-alpine, linux/386)	4m 26s
build (php-8-4-3-alpine, linux/arm/v7)	4m 33s
build (php-8-4-3-alpine, linux/arm64)	4m 29s
build (php-8-4-3-bookworm, linux/amd64)	5m 22s
build (php-8-4-3-bookworm, linux/386)	7m 44s
build (php-8-4-3-bookworm, linux/arm/v7)	8m 10s
build (php-8-4-3-bookworm, linux/arm64)	4m 21s
push	0s
	2h 26m 46s

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