chore: introduce memorystorev2 #242

Job	Run time
go-versions / go-versions	3s
Windows, Go 1.23	1m 7s
Windows, Go 1.22	3m 50s
Windows, Go 1.18	58s
Linux, Go 1.18 / Contract Tests	26s
Linux, Go 1.18 / Benchmarks	4m 44s
Linux, Go 1.18 / Unit Tests and Coverage	1m 2s
Linux, Go 1.22 / Benchmarks	4m 35s
Linux, Go 1.22 / Contract Tests	19s
Linux, Go 1.22 / Unit Tests and Coverage	1m 17s
Linux, Go 1.23 / Benchmarks	4m 48s
Linux, Go 1.23 / Contract Tests	34s
Linux, Go 1.23 / Unit Tests and Coverage	1m 31s
	25m 14s

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