Fixes #37095 - Use shared GitHub workflow to run tests (Katello#10780)

* Fixes #37095 - Use shared GitHub workflow to run tests
* Refs #37095 - move test dependencies into an own group
Also drop some unused dependencies

(cherry picked from commit 16be014)

.github/workflows/ruby.yml

@@ -0,0 +1,27 @@
+---
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 'master'
+      - 'KATELLO-*'
+
+concurrency:
+  group: ${{ github.ref_name }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+jobs:
+  rubocop:
+    name: Rubocop
+    uses: theforeman/actions/.github/workflows/rubocop.yml@v0
+
+  test:
+    name: Ruby
+    needs: rubocop
+    uses: theforeman/actions/.github/workflows/foreman_plugin.yml@v0
+    with:
+      plugin: katello
+      postgresql_container: ghcr.io/theforeman/postgresql-evr
+      test_existing_database: false

Gemfile

@@ -1,3 +1,7 @@
 source 'https://rubygems.org'
 
 gemspec
+
+Dir[File.join(__dir__, 'gemfile.d', '*.rb')].each do |bundle|
+  eval_gemfile(bundle)
+end

gemfile.d/test.rb

@@ -0,0 +1,4 @@
+group :test do
+  gem "vcr", "~> 6.1"
+  gem 'theforeman-rubocop', '~> 0.0.6', require: false
+end

katello.gemspec

@@ -64,14 +64,4 @@ Gem::Specification.new do |gem|
   # UI
   gem.add_dependency "deface", '>= 1.0.2', '< 2.0.0'
   gem.add_dependency "angular-rails-templates", "~> 1.1.0"
-
-  # Testing
-  gem.add_development_dependency "factory_bot_rails", "~> 4.5"
-  gem.add_development_dependency "mocha"
-  gem.add_development_dependency "vcr", "~> 6.1"
-  gem.add_development_dependency "webmock"
-  gem.add_development_dependency "robottelo_reporter"
-
-  # Rubocop
-  gem.add_development_dependency 'theforeman-rubocop', '~> 0.0.6'
 end