actions/tests: Run brew style and brew man before brew tests

- The style and man page checks are quicker than `brew tests`, which can
  take forever.
- If people make mistakes with style or forget to run `brew man`, they
  will notice quicker, thus fixing issues quicker.
- This also wastes less compute time (and therefore energy) by only
  running `brew tests` when all the other less-involved checks work.

.github/workflows/tests.yml

@@ -78,6 +78,12 @@ jobs:
           sudo chmod -R g-w,o-w /home/linuxbrew /home/runner /opt
         fi
 
+    - name: Run brew style
+      run: brew style --display-cop-names
+
+    - name: Run brew man
+      run: brew man --fail-if-changed
+
     - name: Run brew tests
       run: |
         # brew tests doesn't like world writable directories
@@ -107,12 +113,6 @@ jobs:
         # These cannot be queried at the macOS level on GitHub Actions.
         HOMEBREW_LANGUAGES: en-GB
 
-    - name: Run brew style
-      run: brew style --display-cop-names
-
-    - name: Run brew man
-      run: brew man --fail-if-changed
-
     - name: Run brew update-tests
       run: |
         git config --global user.name "BrewTestBot"