github actions: Make builds on Merge Request

Since we need to make sure external contributors code actually compiles prior
to merging. To get access to the forked repos merge request we need to switch
over our push to pull_request. In addition we're fixing up some Naming
Conventions, adding aarch64 to this branch and fixing the naming so that we can
quickly identify if the CI is for x86_64 or aarch64.

.github/workflows/build-check_x86_64.yml

@@ -0,0 +1,34 @@
+name: x86_64 CI
+on:
+  pull_request:
+    branches:
+      - '**'
+      - '!mainline'
+
+jobs:
+  kernel-build-job:
+    runs-on:
+      labels: kernel-build
+    container:
+      image: rockylinux:8
+      env:
+        ROCKY_ENV: rocky8
+      ports:
+        - 80
+      options: --cpus 8
+    steps:
+      - name: Install tools and Libraries
+        run: |
+          dnf groupinstall 'Development Tools' -y
+          dnf install --enablerepo=devel bc dwarves kernel-devel openssl-devel elfutils-libelf-devel -y
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ref: "${{ github.event.pull_request.head.sha }}"
+          fetch-depth: 0
+      - name: Build the Kernel
+        run: |
+          git config --global --add safe.directory /__w/kernel-src-tree/kernel-src-tree
+          cp configs/kernel-rt-4.18.0-x86_64.config .config
+          make olddefconfig
+          make -j8