[QA][Code Coverage] Coverage teams lookup w/o Additional Config (#77111)

* [QA][Code Coverage] Coverage teams lookup

* Fix test per cr.

* Drop unused fn's.

* Add integration test to prove that the sys does indeed
strip the CC prefix and still walks the fs.

* Cleanup "todo" list.

* Use import, like Dima's previous suggestion.

* Add coverage teams only definitions to CODEOWNERS per Lee.

* Add coverage teams for logstash, reporting and security.

* Update description.

* Update names per Lee.

* Drop mutation.

* Fix dupes.

* Add the file check, per Dima

* Add more teams

* Update regex to only match on "build/" and add test.

* More teams

* More teams

* Add print statement of the canonical timestamp,
so we can lookup stuff in gcp during errors.

* CR fixups

scripts/generate_team_assignments.js

@@ -0,0 +1,21 @@
+/*
+ * Licensed to Elasticsearch B.V. under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch B.V. licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+require('../src/setup_node_env');
+require('../src/dev/code_coverage/ingest_coverage/team_assignment').generateTeamAssignments();