Split functional testings via github action matrix

This commit changes the workflow of the github actions.

We split the workflow into different parts:

1) build zfs modules for Ubuntu 20.04 and 22.04 (~25m)
2) 2x zloop test (~10m) + 2x sanity test (~25m)
3) functional testings in parts 1..5 (each ~1h)
   - these could be triggered, when sanity tests are ok
   - currently I just start them all in the same time
4) cleanup and create summary

When everything is fine, the full run with all testings
should be done in around 2 hours.

The codeql.yml and checkstyle.yml are not part in this circle.

The testings are also modified a bit:
- report info about CPU and checksum benchmarks
- reset the debugging logs for each test
  - when some error occurred, we call dmesg with -c to get
    only the log output for the last failed test
  - we empty also the dbgsys

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tino Reichardt <milky-zfs@mcmilk.de>
Closes #14078

.github/workflows/zfs-linux-tests.yml

@@ -0,0 +1,113 @@
+name: zfs-linux-tests
+
+on:
+  workflow_call:
+    inputs:
+      os:
+        description: 'The ubuntu version: 20.02 or 22.04'
+        required: true
+        type: string
+
+jobs:
+
+  zloop:
+    runs-on: ubuntu-${{ inputs.os }}
+    steps:
+    - uses: actions/download-artifact@v3
+      with:
+        name: modules-${{ inputs.os }}
+    - name: Install modules
+      run: |
+        tar xzf modules-${{ inputs.os }}.tgz
+        .github/workflows/scripts/setup-dependencies.sh tests
+    - name: Tests
+      timeout-minutes: 30
+      run: |
+        sudo mkdir -p /var/tmp/zloop
+        # run for 10 minutes or at most 2 iterations for a maximum runner
+        #   time of 20 minutes.
+        sudo /usr/share/zfs/zloop.sh -t 600 -I 2 -l -m1 -- -T 120 -P 60
+    - name: Prepare artifacts
+      if: failure()
+      run: |
+        sudo chmod +r -R /var/tmp/zloop/
+    - uses: actions/upload-artifact@v3
+      if: failure()
+      with:
+        name: Zpool-logs-${{ inputs.os }}
+        path: |
+          /var/tmp/zloop/*/
+          !/var/tmp/zloop/*/vdev/
+        if-no-files-found: ignore
+    - uses: actions/upload-artifact@v3
+      if: failure()
+      with:
+        name: Zpool-files-${{ inputs.os }}
+        path: |
+          /var/tmp/zloop/*/vdev/
+        if-no-files-found: ignore
+
+  sanity:
+    runs-on: ubuntu-${{ inputs.os }}
+    steps:
+    - uses: actions/download-artifact@v3
+      with:
+        name: modules-${{ inputs.os }}
+    - name: Install modules
+      run: |
+        tar xzf modules-${{ inputs.os }}.tgz
+        .github/workflows/scripts/setup-dependencies.sh tests
+    - name: Tests
+      timeout-minutes: 60
+      shell: bash
+      run: |
+        set -o pipefail
+        /usr/share/zfs/zfs-tests.sh -vKR -s 3G -r sanity | scripts/zfs-tests-color.sh
+    - name: Prepare artifacts
+      if: success() || failure()
+      run: |
+        RESPATH="/var/tmp/test_results"
+        mv -f $RESPATH/current $RESPATH/testfiles
+        tar cf $RESPATH/sanity.tar -h -C $RESPATH testfiles
+    - uses: actions/upload-artifact@v3
+      if: success() || failure()
+      with:
+        name: Logs-${{ inputs.os }}-sanity
+        path: /var/tmp/test_results/sanity.tar
+        if-no-files-found: ignore
+
+  functional:
+    runs-on: ubuntu-${{ inputs.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        tests: [ part1, part2, part3, part4 ]
+    steps:
+    - uses: actions/download-artifact@v3
+      with:
+        name: modules-${{ inputs.os }}
+    - name: Install modules
+      run: |
+        tar xzf modules-${{ inputs.os }}.tgz
+        .github/workflows/scripts/setup-dependencies.sh tests
+    - name: Setup tests
+      run: |
+        .github/workflows/scripts/setup-functional.sh ${{ matrix.tests }} >> $GITHUB_ENV
+    - name: Tests
+      timeout-minutes: 120
+      shell: bash
+      run: |
+        set -o pipefail
+        /usr/share/zfs/zfs-tests.sh -vKR -s 3G -T ${{ env.TODO }} | scripts/zfs-tests-color.sh
+    - name: Prepare artifacts
+      if: success() || failure()
+      run: |
+        RESPATH="/var/tmp/test_results"
+        mv -f $RESPATH/current $RESPATH/testfiles
+        tar cf $RESPATH/${{ matrix.tests }}.tar -h -C $RESPATH testfiles
+    - uses: actions/upload-artifact@v3
+      if: success() || failure()
+      with:
+        name: Logs-${{ inputs.os }}-functional
+        path: /var/tmp/test_results/${{ matrix.tests }}.tar
+        if-no-files-found: ignore