ci(core): use -core from Central, do not rebuild locally

.github/workflows/pr-ci.yml

@@ -65,49 +65,12 @@ jobs:
           })
           return { num: result.data.number, head_sha: result.data.head.sha }
 
-  get-pom-properties:
-    runs-on: ubuntu-latest
-    needs: [checkout-branch]
-    steps:
-    - uses: actions/checkout@v2
-      with:
-        repository: cryostatio/cryostat3
-    - id: query-pom
-      name: Get properties from POM
-      run: |
-        CORE_VERSION="$(mvn help:evaluate -Dexpression=io.cryostat.core.version -q -DforceStdout)"
-        echo "core-version=v$CORE_VERSION" >> $GITHUB_OUTPUT
-        IMAGE_VERSION="$(mvn validate help:evaluate -Dexpression=cryostat.imageVersionLower -q -DforceStdout)"
-        echo "image-version=$IMAGE_VERSION" >> $GITHUB_OUTPUT
-    outputs:
-      core-version: ${{ steps.query-pom.outputs.core-version }}
-      image-version: ${{ steps.query-pom.outputs.image-version }}
-
-  build-deps:
-    runs-on: ubuntu-latest
-    needs: [get-pom-properties]
-    steps:
-    - uses: actions/checkout@v3
-      with:
-        repository: cryostatio/cryostat-core
-        ref: ${{ needs.get-pom-properties.outputs.core-version }}
-    - uses: actions/setup-java@v3
-      with:
-        java-version: '17'
-        distribution: 'adopt'
-        cache: maven
-    - run: mvn -B -U -DskipTests=true clean install
-    - uses: actions/upload-artifact@v3
-      with:
-        name: cryostat-core
-        path: /home/runner/.m2/repository/io/cryostat/cryostat-core/
-
   build-image-and-push:
     runs-on: ubuntu-latest
     permissions:
       packages: write
       pull-requests: write
-    needs: [get-pom-properties, build-deps, checkout-branch]
+    needs: [checkout-branch]
     env:
       PR_num: ${{ needs.checkout-branch.outputs.PR_num }}
       head_sha: ${{ needs.checkout-branch.outputs.PR_head_sha }}
@@ -122,10 +85,6 @@ jobs:
         java-version: '17'
         distribution: 'adopt'
         cache: maven
-    - uses: actions/download-artifact@v3
-      with:
-        name: cryostat-core
-        path: /home/runner/.m2/repository/io/cryostat/cryostat-core/
     - name: Build Cryostat application image
       id: build-cryostat-image
       run: |