Upgrade Rails to 7.2.0

1. Remove deprecated support to set Rails.application.config.action_dispatch.show_exceptions to true and false.

Exception won’t be raised in specs

   # Raise exceptions instead of rendering exception templates.
-  config.action_dispatch.show_exceptions = false
+  config.action_dispatch.show_exceptions = :none

1. SQL generated is changed

-    if link = where('course_ids @> \'{?}\'', course.id).first
+    if link = where('course_ids @> ARRAY[?]::bigint[]', course.id).first

1. no lock_thread

NoMethodError: undefined method `lock_thread=' for an instance of ActiveRecord::ConnectionAdapters::ConnectionPool

-    ActiveRecord::Base.connection.pool.lock_thread = false
+    # ActiveRecord::Base.connection.pool.lock_thread = false

1. assert_enqueued_email_with: args vs. params

-    assert_enqueued_email_with UserMailer, :invitation, args: { invitation: invitation }
+    assert_enqueued_email_with UserMailer, :invitation, params: { invitation: invitation }