[vms/platformvm] `RegisterDUnsignedTxsTypes` -> `RegisterDurangoUnsignedTxsTypes` #6599

Job	Run time
Up-to-date protobuf	22s
Up-to-date mocks	2m 19s
Protobuf Lint	6s
e2e	10m 35s
e2e_existing_network	3m 56s
Fuzz	13m 14s
Up-to-date go.mod and go.sum	9s
Lint	3m 13s
Build Antithesis avalanchego images	5m 37s
Build Antithesis xsvm images	8m 12s
Image build	10m 24s
Unit (macos-12)	10m 51s
Upgrade	3m 13s
Unit (ubuntu-20.04)	6m 50s
Unit (ubuntu-22.04)	6m 52s
Unit (windows-2022)	12m 15s
Unit (custom-arm64-focal)	13m 18s
Unit (custom-arm64-jammy)	11m 54s
	2h 3m 20s

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