Compile with GOAMD64=v2

[yperbasis]

x86-64-v2 is almost universally available nowadays. See https://go.dev/wiki/MinimumRequirements#microarchitecture-support

[lystopad]

Done for AMD64 released artifacts.
See -- https://github.com/erigontech/erigon/blob/main/.goreleaser.yml#L27 and other similar configurations for other binaries, os, arch.

[yperbasis]

Done for AMD64 released artifacts. See -- https://github.com/erigontech/erigon/blob/main/.goreleaser.yml#L27 and other similar configurations for other binaries, os, arch.

We should do it by default in make so that all builds, not only releases, have this optimization.

[lystopad]

Done for the main branch (3.x).
In progress for release/2.6x .