Revert "ci: share compiled classes across jobs via artifact"

This reverts commit ecafc8c.

Author: sonus21

.github/workflows/java-ci.yaml

@@ -62,17 +62,6 @@ jobs:
       - name: Compile test sources
         run: ./gradlew compileTestJava
 
-      - name: Upload compiled classes
-        uses: actions/upload-artifact@v4
-        with:
-          name: compiled-classes
-          path: |
-            **/build/classes/
-            **/build/generated/
-            **/build/resources/
-          if-no-files-found: error
-          retention-days: 1
-
   unit_test:
     needs: build
     runs-on: ubuntu-latest
@@ -97,11 +86,6 @@ jobs:
       - name: Set up Gradle
         uses: gradle/actions/setup-gradle@v4
 
-      - name: Download compiled classes
-        uses: actions/download-artifact@v4
-        with:
-          name: compiled-classes
-
       - name: Run unit tests
         run: ./gradlew test -DincludeTags=unit
 
@@ -154,11 +138,6 @@ jobs:
           sudo apt-get install -y redis-server
           redis-cli --version
 
-      - name: Download compiled classes
-        uses: actions/download-artifact@v4
-        with:
-          name: compiled-classes
-
       - name: Run producer-only tests
         run: ./gradlew test -DincludeTags=producerOnly
 
@@ -211,11 +190,6 @@ jobs:
           sudo apt-get install -y redis-server
           redis-cli --version
 
-      - name: Download compiled classes
-        uses: actions/download-artifact@v4
-        with:
-          name: compiled-classes
-
       - name: Run integration tests
         run: ./gradlew test -DincludeTags=integration -DexcludeTags=redisCluster,producerOnly,local
 
@@ -286,11 +260,6 @@ jobs:
           sleep 30
           yes yes | redis-cli --cluster create 127.0.0.1:9000 127.0.0.1:9001 127.0.0.1:9002 127.0.0.1:9003 127.0.0.1:9004 127.0.0.1:9005 --cluster-replicas 1
 
-      - name: Download compiled classes
-        uses: actions/download-artifact@v4
-        with:
-          name: compiled-classes
-
       - name: Run Redis cluster tests
         run: ./gradlew test -DincludeTags=redisCluster
 
@@ -345,11 +314,6 @@ jobs:
           sudo apt-get install -y redis-server
           redis-cli --version
 
-      - name: Download compiled classes
-        uses: actions/download-artifact@v4
-        with:
-          name: compiled-classes
-
       - name: Run reactive integration tests
         run: ./gradlew test -DincludeTags=integration -DexcludeTags=redisCluster,producerOnly,local
 
@@ -418,11 +382,6 @@ jobs:
             sleep 1
           done
 
-      - name: Download compiled classes
-        uses: actions/download-artifact@v4
-        with:
-          name: compiled-classes
-
       - name: Run NATS tests
         env:
           NATS_RUNNING: "true"
@@ -486,10 +445,8 @@ jobs:
       - name: Set up Gradle
         uses: gradle/actions/setup-gradle@v4
 
-      - name: Download compiled classes
-        uses: actions/download-artifact@v4
-        with:
-          name: compiled-classes
+      - name: Compile main sources
+        run: ./gradlew compileJava
 
       - name: Download coverage artifacts
         uses: actions/download-artifact@v4