Merge pull request #26869 from prathamesh-sonpatki/fix-brittle-mysql-…

…tests

Fix brittle tests which were relying on the error message text from mysql2 gem

activerecord/test/cases/adapters/mysql2/connection_test.rb

@@ -65,18 +65,18 @@ def test_successful_reconnection_after_timeout_with_verify
 
   def test_execute_after_disconnect
     @connection.disconnect!
-    error = assert_raise(ActiveRecord::StatementInvalid) do
+
+    assert_raise(ActiveRecord::StatementInvalid) do
       @connection.execute("SELECT 1")
     end
-    assert_match /closed MySQL connection/, error.message
   end
 
   def test_quote_after_disconnect
     @connection.disconnect!
-    error = assert_raise(Mysql2::Error) do
+
+    assert_raise(Mysql2::Error) do
       @connection.quote("string")
     end
-    assert_match /closed MySQL connection/, error.message
   end
 
   def test_active_after_disconnect