chore(lint): modernize Go (#7536)

Use modern Go constructs through the modernize analyzer from the
golang.org/x/tools package.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

plugin/pkg/replacer/replacer.go

@@ -256,7 +256,7 @@ func loadFormat(s string) replacer {
 
 // bufPool stores pointers to scratch buffers.
 var bufPool = sync.Pool{
-	New: func() interface{} {
+	New: func() any {
 		return make([]byte, 0, 256)
 	},
 }