ORC-2139: Improve create_orc_jira.py to provide no-commit feature

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

Add `-n`/`--no-commit` option to `dev/create_orc_jira.py` to skip the commit step after branch creation.

### Why are the changes needed?

When there are no changes to commit, `git commit -a` fails. This option allows users to create a JIRA issue and branch without forcing a commit.

### How was this patch tested?

Manual testing with `--help` to verify the new option is displayed, and with `-n` flag to confirm the commit step is skipped.

### Was this patch authored or co-authored using generative AI tooling?

Generated-by: Claude Code (Claude Opus 4.6)

Closes #2590 from dongjoon-hyun/ORC-2139.

Authored-by: Dongjoon Hyun <dongjoon@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>

Author: dongjoon-hyun

dev/create_orc_jira.py

@@ -121,6 +121,7 @@ def main():
     parser.add_argument("-t", "--type", help="Issue type to create when no parent is specified (e.g. Bug). Defaults to Improvement.")
     parser.add_argument("-v", "--version", help="Version to use for the issue")
     parser.add_argument("-c", "--component", help="Component for the issue")
+    parser.add_argument("-n", "--no-commit", action="store_true", help="Skip creating a commit")
     args = parser.parse_args()
 
     if args.parent:
@@ -133,7 +134,10 @@ def main():
 
     create_and_checkout_branch(jira_id)
 
-    create_commit(jira_id, args.title)
+    if not args.no_commit:
+        create_commit(jira_id, args.title)
+    else:
+        print("Skipped commit creation")
 
 
 if __name__ == "__main__":