CI: do a treeless clone in case we need the history

See https://github.com/msys2/MINGW-packages/pull/21022

.github/workflows/generate-srcinfo.yml

@@ -17,6 +17,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          filter: tree:0
 
       - uses: actions/setup-python@v5
         id: setup-python

.github/workflows/main.yml

@@ -39,6 +39,7 @@ jobs:
         with:
           path: temp
           fetch-depth: 0
+          filter: tree:0
           persist-credentials: false
 
       # to match the autobuild environment