ensure modules are expanded during import

[jbardin]

In order to import into a module, we have to make sure that module has
registered the expansion data.

Fixes #25192

[codecov]

Codecov Report

Merging #25208 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

Impacted Files	Coverage Δ
terraform/graph_builder_import.go	93.93% <100.00%> (+0.83%)	⬆️
terraform/node_resource_plan.go	91.80% <0.00%> (-1.64%)	⬇️
states/statefile/version4.go	57.87% <0.00%> (-0.29%)	⬇️
backend/remote/backend_common.go	55.25% <0.00%> (+0.67%)	⬆️
terraform/transform_import_state.go	93.70% <0.00%> (+1.57%)	⬆️

[ghost]

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