GHA: Remove {pre,post}-action steps for self-hosted runners

The following hooks:

- ACTIONS_RUNNER_HOOK_JOB_STARTED
- ACTIONS_RUNNER_HOOK_JOB_COMPLETED

could perfectly replace the existing {pre,post}-action scripts
and will make a workflow independent of the runner context.
This commit wipes out all GHA steps where the actions are triggered.

Signed-off-by: Hyounggyu Choi <[email protected]>

.github/workflows/push-as-image-to-ghcr.yml

@@ -32,14 +32,6 @@ jobs:
     runs-on: ${{ matrix.instance }}
 
     steps:
-    - name: Take a pre-action for self-hosted runner
-      run: |
-        # NOTE: Use file checking instead triggering a step based on a runner type
-        # to avoid updating the step for each new self-hosted runner.
-        if [ -f "${HOME}/script/pre_action.sh" ]; then
-          "${HOME}/script/pre_action.sh" cc-trustee
-        fi
-
     - name: Checkout code
       uses: actions/checkout@v4
 
@@ -61,14 +53,6 @@ jobs:
           -t "ghcr.io/confidential-containers/staged-images/${{ matrix.tag }}:${commit_sha}-${arch}" \
           -t "ghcr.io/confidential-containers/staged-images/${{ matrix.tag }}:latest-${arch}" .
 
-    - name: Take a post-action for self-hosted runner
-      if: always()
-      run: |
-        # Please check out the note in the pre-action step for the reason of using file checking
-        if [ -f "${HOME}/script/post_action.sh" ]; then
-          "${HOME}/script/post_action.sh" cc-trustee
-        fi
-
   publish_multi_arch_image:
     needs: build_and_push
     permissions:

.github/workflows/push-kbs-client-to-ghcr.yml

@@ -21,14 +21,6 @@ jobs:
       packages: write
 
     steps:
-    - name: Take a pre-action for self-hosted runner
-      run: |
-        # NOTE: Use file checking instead triggering a step based on a runner type
-        # to avoid updating the step for each new self-hosted runner.
-        if [ -f "${HOME}/script/pre_action.sh" ]; then
-          "${HOME}/script/pre_action.sh" cc-trustee
-        fi
-
     - name: Check out code
       uses: actions/checkout@v4
 
@@ -60,11 +52,3 @@ jobs:
         if [ "$(uname -m)" = "x86_64" ]; then
           oras push ghcr.io/confidential-containers/staged-images/kbs-client:latest kbs-client
         fi
-
-    - name: Take a post-action for self-hosted runner
-      if: always()
-      run: |
-        # Please check out the note in the pre-action step for the reason of using file checking
-        if [ -f "${HOME}/script/post_action.sh" ]; then
-          "${HOME}/script/post_action.sh" cc-trustee
-        fi

.github/workflows/push-kbs-image-to-ghcr.yml

@@ -39,14 +39,6 @@ jobs:
     runs-on: ${{ matrix.instance }}
 
     steps:
-    - name: Take a pre-action for self-hosted runner
-      run: |
-        # NOTE: Use file checking instead triggering a step based on a runner type
-        # to avoid updating the step for each new self-hosted runner.
-        if [ -f "${HOME}/script/pre_action.sh" ]; then
-          "${HOME}/script/pre_action.sh" cc-trustee
-        fi
-
     - name: Checkout code
       uses: actions/checkout@v4
 
@@ -71,14 +63,6 @@ jobs:
           -t "ghcr.io/confidential-containers/staged-images/${{ matrix.tag }}:latest-${arch}" \
           --build-arg ARCH="${arch}" --build-arg HTTPS_CRYPTO="${https_crypto}" .
 
-    - name: Take a post-action for self-hosted runner
-      if: always()
-      run: |
-        # Please check out the note in the pre-action step for the reason of using file checking
-        if [ -f "${HOME}/script/post_action.sh" ]; then
-          "${HOME}/script/post_action.sh" cc-trustee
-        fi
-
   publish_multi_arch_image:
     needs: build_and_push
     strategy: