Consider deprecating nixpkgs_go_configure

[malt3]

Is your feature request related to a problem? Please describe.

Upgrading rules_go and the Go toolchain version is not straightforward when using a Go toolchain from rules_nixpkgs. The APIs used from rules_go are not stable.
Also, Go upstream is currently pushing for all downstream packaging to use a reproducible, unmodified Go toolchain (from go.dev).
Since Go 1.21, the unmodified toolchain binaries are statically linked and work on NixOS.

Describe the solution you'd like

One of the following:

Either add some guidance to the docs about the viability of using an unmodified Go toolchain (for Go >= 1.21).
Alternatively, this toolchain could be deprecated and removed in the future.

Describe alternatives you've considered

You could continue packaging the toolchain as currently. This is mostly more maintenance work for tweag and the users. :)

Additional context
Add any other context or screenshots about the feature request here.