[main] Cherry-pick from 2.1 regarding checks for nimg (#973)

* Remove check_nimg from publish_nims workflow (#970)

Remove check_nimg from publish_nims.yml

* Remove requirement for check_nimg to run the unit tests (#971)

Author: dixonjoel

.github/workflows/CI.yml

@@ -21,7 +21,7 @@ jobs:
   run_unit_tests:
     name: Run unit tests
     uses: ./.github/workflows/run_unit_tests.yml
-    needs: [check_nims, check_nimg]
+    needs: [check_nims]
   run_system_tests:
     name: Run system tests
     uses: ./.github/workflows/run_system_tests.yml

.github/workflows/Publish_NIMS.yml

@@ -16,9 +16,8 @@ jobs:
   check_nims:
     name: Check NIMS
     uses: ./.github/workflows/check_nims.yml
-  check_nimg:
-    name: Check NIMG
-    uses: ./.github/workflows/check_nimg.yml
+  # Don't run check_nimg.yml because the generator now depends
+  # on the service and may reference a package version that doesn't exist yet.
   # Don't run check_examples.yml because the examples may reference a
   # package version that doesn't exist yet.
   build: