GitHub Actions cleanups (#24620)

- Remove actions name where command is descriptive enough
- Use kebab-case instead of snake-case for step names
- Use shorter job names because to make PR checks more readable
- Remove duplicate `checks-backend`

---------

Co-authored-by: Yarden Shoham <git@yardenshoham.com>

.github/workflows/pull-compliance-docs.yml

@@ -0,0 +1,22 @@
+name: compliance-docs
+
+on:
+  pull_request:
+    paths:
+      - "docs/**"
+      - "*.md"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  compliance-docs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20
+      - run: make deps-frontend
+      - run: make lint-md