move instrumentation to their own workflow (#8039)

* move instrumentation to their own workflow

* fix yaml

* revert job name change

* fix comment

* fix missing matrix expansion for exercised tests

* fix merge

Author: rochdev

.github/CODEOWNERS

@@ -216,6 +216,7 @@
 /.github/workflows/aiguard.yml @DataDog/asm-js
 /.github/workflows/appsec.yml @DataDog/asm-js
 /.github/workflows/debugger.yml @DataDog/debugger-nodejs
+/.github/workflows/instrumentation.yml @DataDog/apm-idm-js
 /.github/workflows/serverless.yml @DataDog/serverless-aws @DataDog/apm-serverless
 /.github/workflows/llmobs.yml @DataDog/ml-observability
 /.github/workflows/profiling.yml @DataDog/profiling-js