Increase blocksize from ~8KiB to ~64KiB and remove useless unbounded prefetching on download
* increased upload/download speed on my Win10 Zen3 box to 50/150 MB/s (with FSStore)
* made manifest files 8x smaller
* two more changes in the tests to make them pass
Closes#263
* [contracts] ContractInteractions.new() now requires account parameter
* [cli] Only perform Ethereum interactions when --eth-account is specified
* [cli] Add --persistence option that is disabled by default
* [cli] Use Option for ethDeployment parameter
* [node] Better error reporting when Ethereum node cannot be reached
`waitFor` has been moved into the main body of integration test
`nodes negotiate ...` to reduce blockage on the main thread. That change, along
with widening the expiry in `when defined(windows)` (and bumping up
`timeout-minutes` in our CI workflow) allows Windows CI builds to succeed more
consistently, i.e. without timing out.
Bulat-Ziganshin
markspanbroek
Michael Bradley, Jr
Dmitriy Ryajov