chore: introduce memorystorev2 #245

Job	Run time
go-versions / go-versions	3s
Windows, Go 1.23	1m 4s
Windows, Go 1.22	1m 56s
Windows, Go 1.18	1m 1s
Linux, Go 1.18 / Contract Tests	25s
Linux, Go 1.18 / Benchmarks	4m 50s
Linux, Go 1.18 / Unit Tests and Coverage	1m 5s
Linux, Go 1.22 / Benchmarks	4m 34s
Linux, Go 1.22 / Contract Tests	17s
Linux, Go 1.22 / Unit Tests and Coverage	1m 11s
Linux, Go 1.23 / Benchmarks	4m 49s
Linux, Go 1.23 / Contract Tests	30s
Linux, Go 1.23 / Unit Tests and Coverage	1m 20s
	23m 5s

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