[CI] Use 3rd party image for the build and remove test action

.gitea/workflows/build.yml

@@ -6,17 +6,14 @@ jobs:
   build:
     runs-on: ubuntu-latest
     container:
-      image: zmkfirmware/zmk-build-arm:stable
+      image: ghcr.io/bcdevices/zephyr:latest
     name: Build
     steps:
       - name: Install Dependencies
         run: |
           apt-get update;
           apt-get install --yes --no-install-recommends \
-            nodejs \
-            zip \
-            openssl \
-            ca-certificates
+            nodejs
 
       - name: Checkout
         uses: actions/checkout@v3

.gitea/workflows/test.yml

@@ -1,30 +0,0 @@
-on: [push, pull_request, workflow_dispatch]
-
-name: Test
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/bcdevices/zephyr:latest
-    name: Build
-    steps:
-      - name: Install Dependencies
-        run: |
-          apt-get update;
-          apt-get upgrade --yes
-          apt-get install --yes --no-install-recommends \
-            nodejs
-
-      - name: Checkout
-        uses: actions/checkout@v3
-
-      - name: Create some File
-        run: echo "lalala" > test.txt
-
-      - name: Upload Artifact
-        uses: actions/upload-artifact@v3
-        with:
-          path: test.txt
-          name: test.txt
-          if-no-files-found: ignore