Extract workflows dependencies

- Move build dependencies moved to
  `.github/workflows/build-dependencies.txt` shared among workflows.

- Change `ubuntu-latest` -> `ubuntu-20.04` to avoid unexpected
  runner environment updates in `zloop` workflow.

- Change `ubuntu-20.04` -> `ubuntu-latest` to track changes in
  runner environment in `checkstyle` workflow.

- Kernel buffer is flushed before ZTS invocation to avoid storing
  the same data after each test case run.

- `make` is invoked with consistent set of options to reduce
  clutter in logs.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: szubersk <szuberskidamian@gmail.com>
Closes #13037

.github/workflows/zloop.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   tests:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     env:
       TEST_DIR: /var/tmp/zloop
     steps:
@@ -16,22 +16,17 @@ jobs:
     - name: Install dependencies
       run: |
         sudo apt-get update
-        sudo apt-get install --yes -qq build-essential autoconf libtool gdb \
-          git alien fakeroot \
-          zlib1g-dev uuid-dev libblkid-dev libselinux-dev \
-          xfslibs-dev libattr1-dev libacl1-dev libudev-dev libdevmapper-dev \
-          libssl-dev libffi-dev libaio-dev libelf-dev libmount-dev \
-          libpam0g-dev \
-          python3 python3-dev python3-setuptools python3-cffi python3-packaging
+        xargs --arg-file=${{ github.workspace }}/.github/workflows/build-dependencies.txt sudo apt-get install -qq
+        sudo apt-get clean
     - name: Autogen.sh
       run: |
-        sh autogen.sh
+        ./autogen.sh
     - name: Configure
       run: |
         ./configure --enable-debug --enable-debuginfo --enable-asan --enable-ubsan
     - name: Make
       run: |
-        make --no-print-directory -s pkg-utils pkg-kmod
+        make -j$(nproc) --no-print-directory --silent pkg-utils pkg-kmod
     - name: Install
       run: |
         sudo dpkg -i *.deb