[ci] Use shared runners

Signed-off-by: Andrei Kvapil <kvapss@gmail.com>

.github/workflows/pull-requests.yaml

@@ -11,7 +11,7 @@ concurrency:
 jobs:
   build:
     name: Build
-    runs-on: [self-hosted]
+    runs-on: [oracle-4cpu-16gb-x86-64]
     permissions:
       contents: read
       packages: write
@@ -27,22 +27,29 @@ jobs:
           fetch-depth: 0
           fetch-tags: true
 
-      - name: Set up Docker config
-        run: cp -r ~/.docker ${{ runner.temp }}/.docker
-
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
         with:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
           registry: ghcr.io
-        env:
-          DOCKER_CONFIG: ${{ runner.temp }}/.docker
+
+      - name: Install dependencies
+        run: |
+          set -e
+          sudo mkdir -p -m 755 /etc/apt/keyrings
+          sudo wget -O /etc/apt/keyrings/githubcli-archive-keyring.gpg https://cli.github.com/packages/githubcli-archive-keyring.gpg
+          sudo chmod go+r /etc/apt/keyrings/githubcli-archive-keyring.gpg
+          echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null
+          sudo apt update
+          sudo apt install -y jq skopeo gh gawk
+          sudo wget -qO /usr/local/bin/yq https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64
+          sudo chmod +x /usr/local/bin/yq
+          curl https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3 | sudo bash
+          sudo modprobe loop
 
       - name: Build
         run: make build
-        env:
-          DOCKER_CONFIG: ${{ runner.temp }}/.docker
 
       - name: Build Talos image
         run: make -C packages/core/installer talos-nocloud

.github/workflows/tags.yaml

@@ -15,7 +15,7 @@ concurrency:
 jobs:
   prepare-release:
     name: Prepare Release
-    runs-on: [self-hosted]
+    runs-on: [oracle-4cpu-16gb-x86-64]
     permissions:
       contents: write
       packages: write
@@ -99,15 +99,11 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
           registry: ghcr.io
-        env:
-          DOCKER_CONFIG: ${{ runner.temp }}/.docker
 
       # Build project artifacts
       - name: Build
         if: steps.check_release.outputs.skip == 'false'
         run: make build
-        env:
-          DOCKER_CONFIG: ${{ runner.temp }}/.docker
 
       # Commit built artifacts
       - name: Commit release artifacts