[pkg-go] Bug#1025334: Update binary package and XS-Go-Import-Path to match go.mod

[Pirate Praveen]

Package: golang-github-cespare-xxhash
Version: 2.1.1-2

When building gitaly I get,

src/gitlab.com/gitlab-org/gitlab/vendor/github.com/prometheus/client_golang/prometheus/desc.go:22:2: 
cannot find package "github.com/cespare/xxhash/v2" in any of:
        
/<<PKGBUILDDIR>>/_build/src/gitlab.com/gitlab-org/gitlab/vendor/github.com/cespare/xxhash/v2 
(vendor tree)
        /usr/lib/go-1.19/src/github.com/cespare/xxhash/v2 (from $GOROOT)
        /<<PKGBUILDDIR>>/_build/src/github.com/cespare/xxhash/v2 (from 
$GOPATH

even though golang-github-cespare-xxhash-dev is installed.

I think the import path and binary package name should be bumped to 
match go.mod:
module github.com/cespare/xxhash/v2

so binary package should be golang-github-cespare-xxhash-v2-dev. Though 
I'm not 100% sure about the XS-Go-Import-Path as I think it should 
match without a change there.