Skip code coverage in Github Actions

No need to slow down the build with partial coverage analysis that won't
be merged in a single report for the whole build.

Also, this makes builds fail because we are not running the whole suite.

spec/coverage_helper.rb

@@ -1,19 +1,21 @@
 # frozen_string_literal: true
 
-require 'simplecov'
+unless !!ENV['CI']
+  require 'simplecov'
 
-SimpleCov.minimum_coverage 54
-SimpleCov.start 'rails' do
-  add_filter '/bin/'
-  add_filter '/config/'
-  add_filter '/jobs/application_job.rb'
-  add_filter '/schemas/'
-  add_filter '/lib/generators'
-  add_filter '/spec/'
-  add_filter '/vendor/'
-  add_filter '/public'
-  add_filter '/swagger'
-  add_filter '/script'
-  add_filter '/log'
-  add_filter '/db'
+  SimpleCov.minimum_coverage 54
+  SimpleCov.start 'rails' do
+    add_filter '/bin/'
+    add_filter '/config/'
+    add_filter '/jobs/application_job.rb'
+    add_filter '/schemas/'
+    add_filter '/lib/generators'
+    add_filter '/spec/'
+    add_filter '/vendor/'
+    add_filter '/public'
+    add_filter '/swagger'
+    add_filter '/script'
+    add_filter '/log'
+    add_filter '/db'
+  end
 end

spec/spec_helper.rb

@@ -1,7 +1,9 @@
 # frozen_string_literal: true
 
-require 'simplecov'
-SimpleCov.start 'rails'
+unless ENV['CI']
+  require 'simplecov'
+  SimpleCov.start 'rails'
+end
 
 require 'rubygems'