Revert "Issue #3439800 by mstrelan: Standardize location of test modules"

...nother_collection/config_collection_install_test.test.yml

.../collection/test1/config_collection_install_test.test.yml

.../collection/test2/config_collection_install_test.test.yml

...fig/install/entity/config_test.dynamic.dotted.default.yml

...nstall_test/config_collection_clash_install_test.info.yml

...nother_collection/config_collection_install_test.test.yml

.../collection/test1/config_collection_install_test.test.yml

.../collection/test2/config_collection_install_test.test.yml

...fig/install/entity/config_test.dynamic.dotted.default.yml

...t/config/schema/config_collection_install_test.schema.yml

...tion_install_test/config_collection_install_test.info.yml

..._install_test/config_collection_install_test.services.yml

...ts/config_collection_install_test/src/EventSubscriber.php

...tatic_cache_test/config_entity_static_cache_test.info.yml

..._static_cache_test/config_entity_static_cache_test.module

...s/config_entity_static_cache_test/src/ConfigOverrider.php

...g_events_test/config/schema/config_events_test.schema.yml

...nfig/tests/config_events_test/config_events_test.info.yml

.../tests/config_events_test/config_events_test.services.yml

...s/config/tests/config_events_test/src/EventSubscriber.php