Exclude app dependencies from mypy workflow (#18700)

Co-authored-by: Jirka Borovec <6035284+Borda@users.noreply.github.com>
Co-authored-by: Carlos Mocholí <carlossmocholi@gmail.com>

.github/workflows/code-checks.yml

@@ -43,8 +43,9 @@ jobs:
         env:
           FREEZE_REQUIREMENTS: 1
         run: |
-          pip install -e '.[all]' -r requirements/typing.txt
+          # TODO: investigate hanging installation with app sub-package
+          pip install -e '.[pytorch-all,fabric-all]' -r requirements/typing.txt
           pip list
 
       - name: Check typing
-        run: mypy
+        run: mypy --no-warn-unused-ignores