Increase golangci-lint timeout to 10m

This is meant to solve for recurrent timeouts in several steps,
particularly `golangci-lint-control-plane` and `golang-ci-lint-cli`.

An accompanying change in `consul-k8s-workflows` should disable caching
until the (unclear) root of the issue can be resolved, or we can disable
or clear cache in a more targeted way that solves for these cases.

.golangci.yml

@@ -34,4 +34,4 @@ linters-settings:
     simplify: true
 
 run:
-  timeout: 5m
+  timeout: 10m