Maintain a community based depguard rules

[ccoVeille]

github.com/pkg/errors => errors
golang.org/x/net/context => context
syscall => golang.org/x/sys
github.com/hashicorp/go-multierror => errors.Join

note: slices and maps are already handled via https://github.com/ldez/exptostd
golang.org/x/exp/slices => slices
golang.org/x/exp/maps => maps

https://github.com/search?q=path%3Agolangci+language%3Ayaml+-is%3Afork+%22depguard%3A%22&type=code&p=1

[ccoVeille]

     deny: 
       - pkg: "math/rand$" 
         desc: use math/rand/v2

https://github.com/spacemeshos/go-spacemesh/blob/refs%2Fheads%2Fdevelop/.golangci.yml#L309-L319

https://github.com/m3db/m3/blob/refs%2Fheads%2Fmaster/.golangci.yml#L86-L103