[HUDI-4311] Fix Flink lose data on some rollback scene (apache#5950)

(cherry picked from commit 3a1fd22)

Author: wxplovecc

hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/sink/StreamWriteOperatorCoordinator.java

@@ -265,7 +265,7 @@ public void notifyCheckpointComplete(long checkpointId) {
 
   @Override
   public void notifyCheckpointAborted(long checkpointId) {
-    if (checkpointId == this.checkpointId) {
+    if (checkpointId == this.checkpointId && !WriteMetadataEvent.BOOTSTRAP_INSTANT.equals(this.instant)) {
       executor.execute(() -> {
         this.ckpMetadata.abortInstant(this.instant);
       }, "abort instant %s", this.instant);

hudi-flink-datasource/hudi-flink/src/main/java/org/apache/hudi/sink/meta/CkpMetadata.java

@@ -97,8 +97,6 @@ public void close() {
   public void bootstrap(HoodieTableMetaClient metaClient) throws IOException {
     fs.delete(path, true);
     fs.mkdirs(path);
-    metaClient.getActiveTimeline().getCommitsTimeline().filterPendingExcludingCompaction()
-        .lastInstant().ifPresent(instant -> startInstant(instant.getTimestamp()));
   }
 
   public void startInstant(String instant) {