bug(project): Clean up experimenter_test container before trying to create it (#13786)

Because:

- we are creating the experimenter_test container in some situations and
not always cleaning it up

This commit:

- ensures we clean it up before we create it.

Fixes #13785

Author: freshstrangemusic

Makefile

@@ -165,20 +165,21 @@ kill: compose_stop compose_rm docker_prune  ## Stop, remove, and prune container
 	echo "All containers removed!"
 
 lint: build_test  ## Running linting on source code
-	-docker rm experimenter_test;
+	-docker rm experimenter_test
 	$(COMPOSE_TEST_RUN) experimenter sh -c '$(WAIT_FOR_DB) (${PARALLEL} "$(PYTHON_CHECK_MIGRATIONS)" "$(CHECK_DOCS)" "$(RUFF_FORMAT_CHECK)" "$(RUFF_CHECK)" "$(DJLINT_CHECK)" "$(ESLINT_LEGACY)" "$(ESLINT_RESULTS)" "$(ESLINT_NIMBUS_UI)" "$(PYTHON_TYPECHECK)" "$(PYTHON_TEST)" "$(JS_TEST_LEGACY)" "$(JS_TEST_RESULTS)" "$(RESULTS_SCHEMA_CHECK)") ${COLOR_CHECK}'
 
 check: lint
 
 check_and_report: build_test  ## Only to be used on CI
+	-docker rm experimenter_test
 	$(COMPOSE_TEST_RUN) experimenter sh -c '$(WAIT_FOR_DB) (${PARALLEL} "$(PYTHON_COVERAGE)") ${COLOR_CHECK}' || true
 	docker cp experimenter_test:/experimenter/experimenter_coverage.json workspace/test-results
 	docker cp experimenter_test:/experimenter/experimenter_tests.xml workspace/test-results
 	cp workspace/test-results/experimenter_coverage.json $(UNIT_COVERAGE_JSON)
 	cp workspace/test-results/experimenter_tests.xml $(UNIT_JUNIT_XML)
 
 test: build_test  ## Run tests
-	-docker rm experimenter_test;
+	-docker rm experimenter_test
 	$(COMPOSE_TEST_RUN) experimenter sh -c '$(WAIT_FOR_DB) python manage.py test --parallel'
 pytest: test
 
@@ -298,12 +299,13 @@ cirrus_down: cirrus_build
 	$(CIRRUS_ENABLE) $(COMPOSE) down cirrus
 
 cirrus_test: cirrus_build_test
+	-docker rm experimenter_test
 	$(CIRRUS_ENABLE) $(COMPOSE_TEST_RUN) cirrus sh -c '$(CIRRUS_PYTEST)'
 
 cirrus_check: cirrus_lint
-	docker rm experimenter_test
 
 cirrus_lint: cirrus_build_test integration_clean
+	-docker rm experimenter_test
 	$(CIRRUS_ENABLE) $(COMPOSE_TEST_RUN) cirrus sh -c "$(CIRRUS_RUFF_CHECK) && $(CIRRUS_BLACK_CHECK) && $(CIRRUS_PYTHON_TYPECHECK) && $(CIRRUS_PYTEST) && $(CIRRUS_GENERATE_DOCS) --check"
 
 cirrus_check_and_report: cirrus_lint