[SPARK-30253][INFRA] Do not add commits when releasing preview version

### What changes were proposed in this pull request?

This PR add support do not add commits to master branch when releasing preview version.

### Why are the changes needed?

We need manual revert this change, example:
![image](https://user-images.githubusercontent.com/5399861/70788945-f9d15180-1dcc-11ea-81f5-c0d89c28440a.png)

### Does this PR introduce any user-facing change?
No.

### How was this patch tested?

manual test

Closes #26879 from wangyum/SPARK-30253.

Authored-by: Yuming Wang <[email protected]>
Signed-off-by: Yuming Wang <[email protected]>

Author: wangyum

dev/create-release/release-tag.sh

@@ -104,7 +104,11 @@ git commit -a -m "Preparing development version $NEXT_VERSION"
 if ! is_dry_run; then
   # Push changes
   git push origin $RELEASE_TAG
-  git push origin HEAD:$GIT_BRANCH
+  if [[ $RELEASE_VERSION != *"preview"* ]]; then
+    git push origin HEAD:$GIT_BRANCH
+  else
+    echo "It's preview release. We only push $RELEASE_TAG to remote."
+  fi
 
   cd ..
   rm -rf spark