Publish only ZIP artifacts since the plugin has no xxx-client counterpart (opensearch-project#72) (opensearch-project#74)

(cherry picked from commit ac484d3)

Signed-off-by: Andriy Redko <andriy.redko@aiven.io>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

Author: opensearch-trigger-bot[bot]

.github/workflows/check.yml

@@ -18,4 +18,7 @@ jobs:
           cache: gradle
       - name: Run Gradle (check)
         run: |
-          ./gradlew check
+          ./gradlew check
+      - name: Run Gradle (assemble)
+        run: |
+          ./gradlew assemble

build.gradle

@@ -87,7 +87,7 @@ allprojects {
         }
         publications {
             // add license information to generated poms
-            all {
+            pluginZip(MavenPublication) { publication ->
                 pom {
                     name = "opensearch-custom-codecs"
                     description = "OpenSearch plugin that implements custom compression codecs"
@@ -190,4 +190,13 @@ integTest {
 testClusters.integTest {
     testDistribution = "ARCHIVE"
     plugin(project.tasks.bundlePlugin.archiveFile)
-}
+}
+
+tasks.withType(PublishToMavenRepository) {
+    def predicate = provider {
+        publication.name == "pluginZip"
+    }
+    onlyIf("Publishing only ZIP distributions") {
+        predicate.get()
+    }
+}