Modified workflow: Grammar Files & Async Query Core

[ahkcs]

Description

Publish to Maven: Grammar Files & Async Query Core
This PR adds a GitHub Actions workflow to automate the publication of artifacts to the Maven snapshot repository for the language-grammar package and the async-query-core module.

Key Features

1. Grammar File Publishing (language-grammar)
   Collects .g4 ANTLR grammar files from the language-grammar module.

Packages them into a .zip artifact with a generated POM.

Publishes the zip artifact to Maven snapshot repo under org.opensearch:language-grammar.

Injects the current Git commit SHA into maven-metadata.xml as for traceability.

2. Async Query Core Publishing (async-query-core)
   Builds a shaded JAR (shadowJar) of the async-query-core module using Gradle.

Prepares and publishes the JAR and generated POM to Maven snapshot repo under org.opensearch:async-query-core.

Similarly injects the current Git commit SHA into version metadata.

[noCharger]

There are several duplicate logics defined on grammar flow and async-query-core flow. Can we refactor?

[noCharger]

Approved. Let's also ensure that no new syntax or grammar is introduced from g4 files; everything should be the same as the current ones on main branch

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/sql/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/sql/backport-2.x
# Create a new branch
git switch --create backport/backport-3715-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 5eb2e5ba9bb3cea40beacd2fae4d180480c9ed93
# Push it to GitHub
git push --set-upstream origin backport/backport-3715-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/sql/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-3715-to-2.x.

[noCharger]

can you double check the versioning of async-query-core?

Index of /repositories/snapshots/org/opensearch/async-query-core
Name	Last Modified	Size	Description
Parent Directory
0.1.0-SNAPSHOT/	Mon Jun 02 19:17:14 UTC 2025	 	
1.0.0-SNAPSHOT/	Tue Jun 03 00:54:17 UTC 2025	 	
2.20.0.0-SNAPSHOT/	Wed May 28 00:41:29 UTC 2025

on 2.x it should starts from 0.1.0
on main starts from 1.0.0
is this the plan?

[ahkcs]

can you double check the versioning of async-query-core?

Index of /repositories/snapshots/org/opensearch/async-query-core
Name	Last Modified	Size	Description
Parent Directory
0.1.0-SNAPSHOT/	Mon Jun 02 19:17:14 UTC 2025	 	
1.0.0-SNAPSHOT/	Tue Jun 03 00:54:17 UTC 2025	 	
2.20.0.0-SNAPSHOT/	Wed May 28 00:41:29 UTC 2025

on 2.x it should starts from 0.1.0 on main starts from 1.0.0 is this the plan?

It extracts version from build.gradle(async-query-core) file, which is set to be 1.0.0 on main, should I modify it?