tests: Do not call install_check_metrics when installing kata

The `install_kata` function was moved from the metrics' `gha-run.sh`
file to the `common.bash` in the commit 3ffd48b, but I didn't notice
that it brought with it a call to `install_check_metrics`, which is
totally unrelated to installing Kata Containers.

Let's remove the call so the function is a little bit less specific, and
move the call to install_check_metrics to the metrics `gha-run.sh` file.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tests/common.bash

@@ -318,7 +318,6 @@ function install_kata() {
 
 	check_containerd_config_for_kata
 	restart_containerd_service
-	install_checkmetrics
 }
 
 function check_containerd_config_for_kata() {

tests/metrics/gha-run.sh

@@ -95,7 +95,7 @@ function run_test_tensorflow() {
 function main() {
 	action="${1:-}"
 	case "${action}" in
-		install-kata) install_kata ;;
+		install-kata) install_kata && install_checkmetrics ;;
 		make-tarball-results) make_tarball_results ;;
 		run-test-launchtimes) run_test_launchtimes ;;
 		run-test-memory-usage) run_test_memory_usage ;;