Add check-namespace script (#6438)

This also fixes a lot of code files to be conforming to the script.

Co-authored-by: allejok96 <allejok96@gmail.com>

.github/workflows/checks.yml

@@ -5,7 +5,7 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 jobs:
-  check-strings:
+  scripted-checks:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -17,6 +17,8 @@ jobs:
         run: tests/scripted/verify
       - name: Run check-strings
         run: tests/scripted/check-strings
+      - name: Run check-namespace
+        run: tests/scripted/check-namespace
   shellcheck:
     runs-on: ubuntu-latest
     container: koalaman/shellcheck-alpine:v0.4.6