[Sandbox] Allow sandbox to produce blocks or "fast-forward"

[mikedotexe]

Per the discussion here: near/near-workspaces-js#1 @ailisp has mentioned that the Sandbox feature he's worked on provides patch state but not arbitrary block production to simulate "fast-forwarding" in time.

This is a type of testing that is quite difficult using the simulation tests, which will be deprecated in favor of Sandbox testing, which uses the sandbox feature flag from nearcore and can run tests against it, and eventually spoon data from testnet/mainnet into it, and more.

This is a cross-team effort where Dev Platform is hoping to have this feature implemented.

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[bowenwang1996]

Fast forward time should be possible to do now with #5123

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This issue has been automatically marked as stale because it has not had recent activity in the last 2 months.
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Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity in the last 2 months.
It will be closed in 7 days if no further activity occurs.
Thank you for your contributions.