Overhaul ansible-test test path handling. (#61416)

* Remove .keep files from test/results/ dirs.

* Remove classification of test/results/ dir.

* Add results_relative to data context.

* Use variables in delegation paths.

* Standardize file writing and results paths.

* Fix issues reported by PyCharm.

* Clean up invocation of coverage command.

It now runs through the injector.

* Hack to allow intercept_command in cover.py.

* Simplify git ignore for test results.

* Use test result tmp dir instead of cache dir.

* Remove old .pytest_cache reference.

* Fix unit test docker delegation.

* Show HTML report link.

* Clean up more results references.

* Move import sanity test output to .tmp dir.

* Exclude test results dir from coverage.

* Fix import sanity test lib paths.

* Fix hard-coded import test paths.

* Fix most hard-coded integration test paths.

* Fix PyCharm warnings.

* Fix import placement.

* Fix integration test dir path.

* Fix Shippable scripts.

* Fix Shippable matrix check.

* Overhaul key pair management.

.gitignore

@@ -79,14 +79,7 @@ ansible.egg-info/
 # Release directory
 packaging/release/ansible_release
 /.cache/
-/test/results/coverage/*=coverage.*
-/test/results/coverage/coverage*
-/test/results/reports/coverage*.xml
-/test/results/reports/coverage*/
-/test/results/bot/*.json
-/test/results/junit/*.xml
-/test/results/logs/*.log
-/test/results/data/*.json
+/test/results/
 /test/integration/cloud-config-aws.yml
 /test/integration/inventory.networking
 /test/integration/inventory.winrm