[SPARK-52964] Add merge_connect_rust_pr.py and PULL_REQUEST_TEMPLATE

[sarutak]

Description

This PR proposes adding merge_connect_rust_pr.py and PULL_REQUEST_TEMPLATE like the Spark repository does.
These files are brought from Spark repository and tweaked. The diffs are:

• diff spark-connect-rust/dev/merge_connect_rust_pr.py spark/dev/merge_spark_pr.py

> # Location of your Spark git development area
> SPARK_HOME = os.environ.get("SPARK_HOME", os.getcwd())
65,66c67,68
< GITHUB_BASE = "https://github.com/apache/spark-connect-rust/pull"
< GITHUB_API_BASE = "https://api.github.com/repos/apache/spark-connect-rust"
---
> GITHUB_BASE = "https://github.com/apache/spark/pull"
> GITHUB_API_BASE = "https://api.github.com/repos/apache/spark"
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>     os.chdir(SPARK_HOME)

• diff spark-connect-rust/.github/PULL_REQUEST_TEMPLATE spark/.github/PULL_REQUEST_TEMPLATE

>   7. If you want to add a new configuration, please read the guideline first for naming configurations in
>      'core/src/main/scala/org/apache/spark/internal/config/ConfigEntry.scala'.
>   8. If you want to add or modify an error type or message, please read the guideline first in
>      'common/utils/src/main/resources/error/README.md'.
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> If benchmark tests were added, please run the benchmarks in GitHub Actions for the consistent environment, and the instructions could accord to: https://spark.apache.org/developer-tools.html#github-workflow-benchmarks.

I confirmed this script works by:

1. Changing the script to direct my own repository instead of Apache's one like as follows and push this change to my master branch.

--- a/dev/merge_connect_rust_pr.py
+++ b/dev/merge_connect_rust_pr.py
@@ -43,9 +43,9 @@ except ImportError:
     JIRA_IMPORTED = False
 
 # Remote name which points to the Github site
-PR_REMOTE_NAME = os.environ.get("PR_REMOTE_NAME", "apache-github")
+PR_REMOTE_NAME = os.environ.get("PR_REMOTE_NAME", "sarutak-github")
 # Remote name which points to Apache git
-PUSH_REMOTE_NAME = os.environ.get("PUSH_REMOTE_NAME", "apache")
+PUSH_REMOTE_NAME = os.environ.get("PUSH_REMOTE_NAME", "sarutak")
 # ASF JIRA username
 JIRA_USERNAME = os.environ.get("JIRA_USERNAME", "")
 # ASF JIRA password
@@ -62,8 +62,8 @@ JIRA_ACCESS_TOKEN = os.environ.get("JIRA_ACCESS_TOKEN")
 GITHUB_OAUTH_KEY = os.environ.get("GITHUB_OAUTH_KEY")
 
 
-GITHUB_BASE = "https://github.com/apache/spark-connect-rust/pull"
-GITHUB_API_BASE = "https://api.github.com/repos/apache/spark-connect-rust"
+GITHUB_BASE = "https://github.com/sarutak/spark-connect-rust/pull"
+GITHUB_API_BASE = "https://api.github.com/repos/sarutak/spark-connect-rust"
 JIRA_BASE = "https://issues.apache.org/jira/browse"
 JIRA_API_BASE = "https://issues.apache.org/jira"
 # Prefix added to temporary branches

2. Create a PR to my master branch
3. Merge the PR using the script and the PR is automatically closed

The commit log of the change merged by this script is like as follows.

Author: Kousuke Saruta <sarutak@amazon.co.jp>
Date:   Tue Jul 29 01:58:47 2025 +0900

    Add test.txt
    
    ### What changes were proposed in this pull request?
    test
    
    ### Why are the changes needed?
    test
    
    ### Does this PR introduce _any_ user-facing change?
    No
    
    ### How was this patch tested?
    test
    
    ### Was this patch authored or co-authored using generative AI tooling?
    No
    
    Closes #3 from sarutak/merge-test-pr.
    
    Authored-by: Kousuke Saruta <sarutak@amazon.co.jp>
    Signed-off-by: Kousuke Saruta <sarutak@amazon.co.jp>

Related Issue(s)

SPARK-52964

[xuanyuanking]

Thanks @sarutak for this change!
Do we also need to disable the merge button here https://github.com/apache/spark-connect-rust/blob/master/.asf.yaml#L28?

[sarutak]

@xuanyuanking Thank you for pointing it out. I'll update it.

[sarutak]

@xuanyuanking I checked the way Spark, spark-connect-swift and spark-connect-go.

• Spark: https://github.com/apache/spark/blob/master/.asf.yaml
• Go: https://github.com/apache/spark-connect-go/blob/master/.asf.yaml
• Swift: https://github.com/apache/spark-connect-swift/blob/main/.asf.yaml

These all don't disable the merge button so how about leaving it as it is?

[xuanyuanking]

@sarutak ah make sense. Then let's just not use the button after merging the merge_script. Thanks for the further check!

[sarutak]

@xuanyuanking Thanks!