[Fixes #14358] Align GWC template to the default GWC configuration

[etj]

Aligned to the default GWC config and the official XML layer representation

Checklist

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[gemini-code-assist]

Code Review

This pull request updates the GeoServer Layer XML template create_template.xml by changing the height in metaWidthHeight from 1 to 2, adding a new gridSubset for EPSG:900913x2, and removing the expireCache, expireClients, and cacheWarningSkips elements. There are no review comments to evaluate, and I have no feedback to provide.

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[Copilot]

Pull request overview

Updates GeoWebCache (GWC) layer XML template used by GeoNode’s GeoServer management command(s) to better match GeoServer/GWC’s default layer configuration and official REST XML representation.

Changes:

• Adjusts metatile dimensions (metaWidthHeight) from 2x1 to 2x2.
• Adds the EPSG:900913x2 grid subset to the generated layer definition.
• Removes expireCache, expireClients, and cacheWarningSkips elements from the template.

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[github-actions]

The backport to 5.1.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-5.1.x 5.1.x
# Navigate to the new working tree
cd .worktrees/backport-5.1.x
# Create a new branch
git switch --create backport-14378-to-5.1.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 b29cb7e8f4c59f34925e55d960ffcc4f15fef6f6
# Push it to GitHub
git push --set-upstream origin backport-14378-to-5.1.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-5.1.x

Then, create a pull request where the base branch is 5.1.x and the compare/head branch is backport-14378-to-5.1.x.