Fix grdsample and add tests for registration changes#4180

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Chuan1937 wants to merge 2 commits intoGenericMappingTools:mainfrom

Chuan1937:pygmt-grdsample

Commits on Oct 31, 2025

Fix grdsample and add tests for registration changes
Chuan1937
committed

Commits on Nov 1, 2025

focus on fixing the different with memory grid and file grid
Chuan1937
committed