ci: doc: build the documentation using GitHub-hosted runners

There is no reason to use our custom runners for docs build
as it's equally fast on GH default runners and allows doc CI
to be expedited more quickly even when our build farm is
busy.

Signed-off-by: Benjamin Cabé <[email protected]>

.github/workflows/doc-build.yml

@@ -62,20 +62,13 @@ jobs:
     if: >
       github.repository_owner == 'zephyrproject-rtos' &&
         ( needs.doc-file-check.outputs.file_check == 'true' || github.event_name != 'pull_request' )
-    runs-on:
-      group: zephyr-runner-v2-linux-x64-4xlarge
+    runs-on: ubuntu-22.04
     timeout-minutes: 90
     concurrency:
       group: doc-build-html-${{ github.ref }}
       cancel-in-progress: true
 
     steps:
-    - name: Print cloud service information
-      run: |
-        echo "ZEPHYR_RUNNER_CLOUD_PROVIDER = ${ZEPHYR_RUNNER_CLOUD_PROVIDER}"
-        echo "ZEPHYR_RUNNER_CLOUD_NODE = ${ZEPHYR_RUNNER_CLOUD_NODE}"
-        echo "ZEPHYR_RUNNER_CLOUD_POD = ${ZEPHYR_RUNNER_CLOUD_POD}"
-
     - name: install-pkgs
       run: |
         sudo apt-get update
@@ -192,8 +185,7 @@ jobs:
     if: |
       github.event_name != 'pull_request' &&
       github.repository_owner == 'zephyrproject-rtos'
-    runs-on:
-      group: zephyr-runner-v2-linux-x64-4xlarge
+    runs-on: ubuntu-22.04
     container: texlive/texlive:latest
     timeout-minutes: 120
     concurrency:
@@ -205,12 +197,6 @@ jobs:
       run: |
         git config --global --add safe.directory ${GITHUB_WORKSPACE}
 
-    - name: Print cloud service information
-      run: |
-        echo "ZEPHYR_RUNNER_CLOUD_PROVIDER = ${ZEPHYR_RUNNER_CLOUD_PROVIDER}"
-        echo "ZEPHYR_RUNNER_CLOUD_NODE = ${ZEPHYR_RUNNER_CLOUD_NODE}"
-        echo "ZEPHYR_RUNNER_CLOUD_POD = ${ZEPHYR_RUNNER_CLOUD_POD}"
-
     - name: checkout
       uses: actions/checkout@v4