replace uses of runtime.fastrand with math/rand/v2 once we require go 1.22

[mvdan]

pebble/internal/fastrand/fastrand.go

Line 11 in dbeb058

//go:linkname Uint32 runtime.fastrand

There's a public replacement in math/rand/v2 starting in the upcoming Go 1.22, and Go 1.24 will remove runtime.fastrand. See https://go-review.googlesource.com/c/go/+/548235.

You might want to wait until Go 1.22 or even 1.23 is out to do this; this issue is mainly a heads up and a reminder :)