CRS change crashes with grid-based projections when layer resolution limits are configured #12627

[rowheat02]

Description

This PR prevents CRS switching from failing for layers with resolution limits when the target CRS uses a datum grid. The resolution anchor now remains in the source CRS, uses the current map center for deterministic conversion, and snaps converted limits to the nearest target CRS resolution.

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x", remove the others)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

Issue

What is the current behavior?

#12627
The CRS change fails with a transformation error.

What is the new behavior?

No crash when changing the CRS on the map with resolution configured for some layers

Breaking change

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No

Other useful information