Ignore rake task license check on geo secondaries

- It seemed strange to be prompted for a license installation on geo
  secondary site application nodes when a license is only required on
  Geo primary site application nodes. Alter the gitlab:geo:check rake
  task to properly inform the user about the license situation.

Related https://gitlab.com/gitlab-org/gitlab-orchestrator/-/issues/30Signed-off-by: Robert Marshall <rmarshall@gitlab.com>

ee/changelogs/unreleased/ignore-geo-check-license-check-on-secondaries.yml

+---
+title: Ignore rake task license check on geo secondaries
+merge_request: 42920
+author:
+type: fixed

ee/lib/system_check/geo/license_check.rb

@@ -6,7 +6,21 @@ module SystemCheck
       set_name 'GitLab Geo is available'
 
       def check?
-        Gitlab::Geo.license_allows?
+        return true unless Gitlab::Geo.enabled?
+
+        Gitlab::Geo.primary? ? Gitlab::Geo.license_allows? : true
+      end
+
+      def self.check_pass
+        if Gitlab::Geo.primary? && !Gitlab::Geo.enabled?
+          return 'License supports Geo, but Geo is not enabled' if Gitlab::Geo.license_allows?
+
+          return 'License does not support Geo, and Geo is not enabled'
+        elsif Gitlab::Geo.enabled? && !Gitlab::Geo.license_allows?
+          return 'License only required on a primary site'
+        end
+
+        ""
       end
 
       def show_error

ee/spec/lib/system_check/geo/license_check_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe SystemCheck::Geo::LicenseCheck do
+  describe '#check?' do
+    using RSpec::Parameterized::TableSyntax
+
+    where(:primary, :geo_enabled, :license_allows, :check_result, :pass_message) do
+      true | true | true | true | ''
+      true | true | false | false | ''
+      true | false | true | true | 'License supports Geo, but Geo is not enabled'
+      true | false | false | true | 'License does not support Geo, and Geo is not enabled'
+      false | true | true | true | ''
+      false | true | false | true | 'License only required on a primary site'
+      false | false | true | true | ''
+      false | false | false | true | ''
+    end
+
+    with_them do
+      before do
+        allow(Gitlab::Geo).to receive(:primary?).and_return(primary)
+        allow(Gitlab::Geo).to receive(:enabled?).and_return(geo_enabled)
+        allow(Gitlab::Geo).to receive(:license_allows?).and_return(license_allows)
+      end
+
+      it 'checks the license' do
+        expect(subject.check?).to eq(check_result)
+        expect(described_class.check_pass).to eq(pass_message) if check_result
+      end
+    end
+  end
+end