feat: cross-platform force-kill primitive for stuck PHP threads #4669

Job	Run time
prepare	15s
Build macOS arm64 binaries	10m 23s
Build linux/arm64 static GNU binary	9m 31s
Build linux/amd64 static GNU binary	10m 14s
Build linux/amd64 static musl binary (mimalloc)	10m 11s
Build linux/amd64 static musl binary	9m 29s
Build linux/amd64 static musl binary (debug)	10m 11s
Build linux/arm64 static musl binary	10m 12s
Build macOS x86_64 binaries	5m 43s
push	1s
	1h 16m 10s

Provide feedback