.github/workflows/codeql.yml: Add emacs output

Updates the workflow to also output files that can be loaded in emacs
to show CodeQL issues (in addition to the existing SARIF output for
standard SARIF viewers).

The emacs files are in the SARIF zip file attached to each "CodeQL"
run (https://github.com/tianocore/edk2/actions/workflows/codeql.yml).

The file name ends with "-emacs.txt". An MdePkg example:
  "codeql-db-mdepkg-debug-0-emacs.txt".

Cc: Joey Vagedes <[email protected]>
Cc: Laszlo Ersek <[email protected]>
Cc: Michael D Kinney <[email protected]>
Cc: Sean Brogan <[email protected]>
Signed-off-by: Michael Kubacki <[email protected]>
Acked-by: Michael D Kinney <[email protected]>
Reviewed-by: Joey Vagedes <[email protected]>

.github/workflows/codeql.yml

@@ -92,7 +92,7 @@ jobs:
         git config --system core.longpaths true
 
     - name: Install/Upgrade pip Modules
-      run: pip install -r pip-requirements.txt --upgrade requests
+      run: pip install -r pip-requirements.txt --upgrade requests sarif-tools
 
     - name: Determine CI Settings File Supported Operations
       id: get_ci_file_operations
@@ -304,16 +304,26 @@ jobs:
         PACKAGE_NAME: ${{ matrix.Package }}
       shell: python
       run: |
+        import logging
         import os
+        from edk2toollib.utility_functions import RunCmd
+        from io import StringIO
+        from pathlib import Path
 
         package = os.environ['PACKAGE_NAME'].strip().lower()
         directory_name = 'codeql-analysis-' + package + '-debug'
         file_name = 'codeql-db-' + package + '-debug-0.sarif'
-        sarif_path = os.path.join('Build', directory_name, file_name)
+        sarif_path = Path('Build', directory_name, file_name)
 
         with open(os.environ['GITHUB_OUTPUT'], 'a') as fh:
-            if os.path.isfile(sarif_path):
+            if sarif_path.is_file():
+                emacs_file_path = sarif_path.with_name(sarif_path.stem + "-emacs.txt")
+                out_stream_buffer = StringIO()
+                exit_code = RunCmd("sarif", f"emacs {sarif_path} --output {emacs_file_path} --no-autotrim",
+                                   outstream=out_stream_buffer,
+                                   logging_level=logging.NOTSET)
                 print(f'upload_sarif_file=true', file=fh)
+                print(f'emacs_file_path={emacs_file_path}', file=fh)
                 print(f'sarif_file_path={sarif_path}', file=fh)
             else:
                 print(f'upload_sarif_file=false', file=fh)
@@ -323,7 +333,9 @@ jobs:
       if: steps.env_data.outputs.upload_sarif_file == 'true'
       with:
         name: ${{ matrix.Package }}-CodeQL-SARIF
-        path: ${{ steps.env_data.outputs.sarif_file_path }}
+        path: |
+          ${{ steps.env_data.outputs.emacs_file_path }}
+          ${{ steps.env_data.outputs.sarif_file_path }}
         retention-days: 14
         if-no-files-found: warn