Allow all Jira integrations to set deployment_type

Previously the `#testable?` check meant that instance and group-level
Jira integrations would set their `deployment_type` to `unknown`.

This change means they will set it to `cloud` or `server` when possible.

https://gitlab.com/gitlab-org/gitlab/-/issues/336486

app/models/integrations/jira.rb

@@ -539,8 +539,7 @@ module Integrations
     end
 
     def update_deployment_type?
-      (api_url_changed? || url_changed? || username_changed? || password_changed?) &&
-        testable?
+      api_url_changed? || url_changed? || username_changed? || password_changed?
     end
 
     def update_deployment_type

spec/models/integrations/jira_spec.rb

@@ -334,16 +334,6 @@ RSpec.describe Integrations::Jira do
           end
         end
 
-        context 'when not allowed to test an instance or group' do
-          it 'does not update deployment type' do
-            allow(integration).to receive(:testable?).and_return(false)
-
-            integration.update!(url: 'http://first.url')
-
-            expect(WebMock).not_to have_requested(:get, /serverInfo/)
-          end
-        end
-
         context 'stored password invalidation' do
           context 'when a password was previously set' do
             context 'when only web url present' do