fix(shwap/bitswap): Blockstore.GetSize: getting size with no compute #9654

Job	Run time
setup	1s
Markdown Lint	7s
yamllint	7s
hadolint / hadolint	7s
goreleaser	0s
upload-docs	0s
go-ci / Setup	1s
go-ci / Go Mod Tidy Check	25s
go-ci / Lint	1m 37s
go-ci / Lint Imports	24s
go-ci / Unit Tests Coverage (ubuntu-latest)	5m 11s
go-ci / Unit Tests Coverage (macos-14)	4m 8s
go-ci / Integration Tests / Integration Tests API	3m 14s
go-ci / Integration Tests / Integration Tests Blob	2m 45s
go-ci / Integration Tests / Integration Tests Fraud	2m 22s
go-ci / Integration Tests / Integration Tests ND	2m 48s
go-ci / Integration Tests / Integration Tests p2p	2m 54s
go-ci / Integration Tests / Integration Tests Sync	2m 41s
go-ci / Integration Tests / Da Tests Sync	2m 39s
go-ci / Integration Tests / Integration Tests Reconstruction	2m 31s
go-ci / Integration Tests / Integration Tests Sync	3m 1s
	37m 3s

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