ci: do not run golangci-lint with `new` in CI
ci: do not run golangci-lint with `new` in CI

The `new` flag will only check the _LAST_ commit in a PR, not all of
them. We only want to use `--new` when running in a git post-commit
hook.

Signed-off-by: Vicent Marti <2a2c16577cf04fb953d196f935e266724d4c66a1@strn.cat>

mahak/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,mahak/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess