[SPARK-39038][CI] Skip reporting test results if triggering workflow was skipped
[SPARK-39038][CI] Skip reporting test results if triggering workflow was skipped

### What changes were proposed in this pull request?
The `"Report test results"` workflow should be skipped when the triggering workflow completed with conclusion `'skipped'`.

### Why are the changes needed?
The `"Report test results"` workflow is triggered when either `"Build and test"` or `"Build and test (ANSI)"` complete. On fork repositories, workflow `"Build and test (ANSI)"` is always skipped.

The triggered `"Report test results"` workflow downloads artifacts from the triggering workflow and errors because there are none artifacts.

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?
In personal repo:
- https://github.com/EnricoMi/spark/actions/runs/2231657986
- triggered by https://github.com/EnricoMi/spark/actions/runs/2231657828

Closes #36371 from EnricoMi/master.

Authored-by: Enrico Minack <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@enrico.minack.dev>
Signed-off-by: Hyukjin Kwon <2680965ad5aae29275c8fb10150cb10f5554e78b@apache.org>

rednaxelafx/apache-spark,zzcclp/spark,vinodkc/spark,apache/spark,nchammas/spark,shaneknapp/spark,shaneknapp/spark,JoshRosen/spark,cloud-fan/spark,ueshin/apache-spark,rednaxelafx/apache-spark,shaneknapp/spark,HyukjinKwon/spark,hvanhovell/spark,mahak/spark,srowen/spark,HyukjinKwon/spark,holdenk/spark,dongjoon-hyun/spark,JoshRosen/spark,WeichenXu123/spark,vinodkc/spark,witgo/spark,witgo/spark,nchammas/spark,hvanhovell/spark,JoshRosen/spark,zero323/spark,witgo/spark,zzcclp/spark,JoshRosen/spark,rednaxelafx/apache-spark,cloud-fan/spark,vinodkc/spark,shaneknapp/spark,apache/spark,cloud-fan/spark,dongjoon-hyun/spark,shaneknapp/spark,zzcclp/spark,mahak/spark,cloud-fan/spark,zzcclp/spark,hvanhovell/spark,HyukjinKwon/spark,ueshin/apache-spark,zzcclp/spark,gengliangwang/spark,WeichenXu123/spark,dongjoon-hyun/spark,WeichenXu123/spark,HyukjinKwon/spark,shaneknapp/spark,zero323/spark,gengliangwang/spark,mahak/spark,ueshin/apache-spark,HyukjinKwon/spark,holdenk/spark,hvanhovell/spark,JoshRosen/spark,srowen/spark,cloud-fan/spark,WeichenXu123/spark,WeichenXu123/spark,hvanhovell/spark,vinodkc/spark,shaneknapp/spark,dongjoon-hyun/spark,rednaxelafx/apache-spark,zero323/spark,nchammas/spark,nchammas/spark,zzcclp/spark,nchammas/spark,mahak/spark,rednaxelafx/apache-spark,witgo/spark,rednaxelafx/apache-spark,zero323/spark,srowen/spark,srowen/spark,nchammas/spark,rednaxelafx/apache-spark,witgo/spark,HyukjinKwon/spark,wangyum/spark,wangyum/spark,nchammas/spark,apache/spark,holdenk/spark,wangyum/spark,HyukjinKwon/spark,dongjoon-hyun/spark,zero323/spark,apache/spark,gengliangwang/spark,gengliangwang/spark,wangyum/spark,ueshin/apache-spark,JoshRosen/spark,WeichenXu123/spark,ueshin/apache-spark,witgo/spark,srowen/spark,vinodkc/spark,holdenk/spark,mahak/spark,apache/spark,cloud-fan/spark,zzcclp/spark,srowen/spark,hvanhovell/spark,apache/spark,cloud-fan/spark,holdenk/spark,gengliangwang/spark,gengliangwang/spark,vinodkc/spark,mahak/spark,wangyum/spark,ueshin/apache-spark,apache/spark,mahak/spark,WeichenXu123/spark,zero323/spark,wangyum/spark,ueshin/apache-spark,JoshRosen/spark,vinodkc/spark,zero323/spark,holdenk/spark,dongjoon-hyun/spark,witgo/spark,dongjoon-hyun/spark,gengliangwang/spark,holdenk/spark,srowen/spark,hvanhovell/spark,wangyum/spark