fix: tests: Use mutex-wrapped datastore in storage tests

[magik6k]

Related Issues

Should fix a flake from https://app.circleci.com/pipelines/github/filecoin-project/lotus/28667/workflows/ae7a8156-78d0-48c2-852f-e203ea10e251/jobs/966677

Proposed Changes

Additional Info

fatal error: concurrent map read and map write

goroutine 103 [running]:
github.com/ipfs/go-datastore.(*MapDatastore).Has(0xc000046420?, {0x37e6f28?, 0xc00054be20?}, {{0xc00003a420?, 0x2c?}})
	/home/circleci/go/pkg/mod/github.com/ipfs/go-datastore@v0.6.0/basic_ds.go:51 +0x2e
github.com/filecoin-project/go-statestore.(*StoredState).End(0xc00054be68)
	/home/circleci/go/pkg/mod/github.com/filecoin-project/go-statestore@v0.2.0/state.go:20 +0x43
github.com/filecoin-project/lotus/storage/sealer.(*workerCallTracker).onReturned(0x37d9f58?, {{0x3e8, 0x1}, {0xce, 0xc, 0x8, 0x2b, 0x5a, 0x7a, 0x4c, ...}})
	/home/circleci/lotus/storage/sealer/worker_calltracker.go:55 +0x8a
github.com/filecoin-project/lotus/storage/sealer.(*LocalWorker).asyncCall.func1()
	/home/circleci/lotus/storage/sealer/worker_local.go:300 +0x3f7
created by github.com/filecoin-project/lotus/storage/sealer.(*LocalWorker).asyncCall
	/home/circleci/lotus/storage/sealer/worker_local.go:275 +0x34f

Checklist

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• PR title is in the form of of <PR type>: <area>: <change being made>
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  • PR type: fix, feat, build, chore, ci, docs, perf, refactor, revert, style, test
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• New features have usage guidelines and / or documentation updates in
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• Tests exist for new functionality or change in behavior
• CI is green