btrfs-progs: ci: add configure option build tests

Pre-release build checks are not yet done in the CI, so add a workflow
for that and only for the release-test branch as this usually does not
break and can take a long time due to the number of options (even with
ccache).

Signed-off-by: David Sterba <dsterba@suse.com>

Author: kdave

.github/workflows/extended-build.yml

@@ -0,0 +1,18 @@
+# Build tests of various combinations of configure options
+# (pre-release tests)
+
+name: Extended build tests
+run-name: Extended build tests
+on:
+  push:
+    branches:
+      - release-test
+jobs:
+  build:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - run: sudo apt-get update -qqq
+      - run: sudo apt-get install -y pkg-config gcc liblzo2-dev libzstd-dev libblkid-dev uuid-dev zlib1g-dev libext2fs-dev e2fsprogs libudev-dev python3-sphinx libaio-dev liburing-dev attr ccache
+      - name: Run tests/build-tests.sh
+        run: ./tests/build-tests.sh --ccache