Chore: Typecheck TypeScript in CI pipelines (#23052)

* circle-test-frontend.sh: Typecheck TypeScript
* Chore: fixes type errors
Co-authored-by: Hugo Häggmark <hugo.haggmark@grafana.com>

scripts/circle-test-frontend.sh

@@ -5,8 +5,10 @@ source "$(dirname "$0")/helpers/exit-if-fail.sh"
 
 start=$(date +%s)
 
-exit_if_fail npm run prettier:check
-exit_if_fail npm run test
+exit_if_fail yarn run prettier:check
+exit_if_fail yarn run packages:typecheck
+exit_if_fail yarn run typecheck
+exit_if_fail yarn run test
 
 end=$(date +%s)
 seconds=$((end - start))