Bump golangci/golangci-lint-action from 6 to 7 (#1361)

* Bump golangci/golangci-lint-action from 6 to 7

Bumps [golangci/golangci-lint-action](https://github.com/golangci/golangci-lint-action) from 6 to 7.
- [Release notes](https://github.com/golangci/golangci-lint-action/releases)
- [Commits](https://github.com/golangci/golangci-lint-action/compare/v6...v7)

---
updated-dependencies:
- dependency-name: golangci/golangci-lint-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

* use latest golangci-lint

* pin to v2.0

* golangci-lint migrate

* make the tests happy

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Wade Simmons <wsimmons@slack-corp.com>

firewall_test.go

@@ -792,7 +792,7 @@ func TestFirewall_convertRule(t *testing.T) {
 	}
 
 	r, err = convertRule(l, c, "test", 1)
-	assert.Equal(t, "", ob.String())
+	assert.Empty(t, ob.String())
 	require.Error(t, err, "group should contain a single value, an array with more than one entry was provided")
 
 	// Make sure a well formed group is alright