Temporary fixes for build errors

[vmmusings]

Description

• Bug Issue for week, weekoftheyear fix : [BUG] Fix DateTimeFunctionTest. testWeekOfYearWithTimeType() YearweekTest. testYearweekWithTimeType() Unit tests. #2477
• Enhancement request issue for RFC3339_LENIENT dateformat issue: [FEATURE] Support RFC3339_LENIENT date format introduced in Opensearch Core. #2478
• Added temporary fixes for above two issues for unblocking other PRs as it is taking longer time to fix them.
• Included latest grammar files.
• Excluded ANTLR generated files from spotless check.

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6f30aea) 95.41% compared to head (f476f92) 95.41%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #2476   +/-   ##
=========================================
  Coverage     95.41%   95.41%           
  Complexity     5000     5000           
=========================================
  Files           479      479           
  Lines         13950    13950           
  Branches        937      937           
=========================================
  Hits          13310    13310           
  Misses          618      618           
  Partials         22       22           

Flag	Coverage Δ
sql-engine	95.41% <ø> (ø)

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[noCharger]

Thanks Vamsi, just wanna link this fix to the issue for tracking #2468

[noCharger]

Overall looks good. Thanks Vamsi

[noCharger]

Why do we need to update .g4?

[vmmusings]

These g4 files come from opensearch-spark. We always keep them up to date.

[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-2476-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 6fcf31b7dc4a9a1a80a1e95c30fc7e72408e7812
# Push it to GitHub
git push --set-upstream origin backport/backport-2476-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-2476-to-2.x.