chore: package ckb-cli v0.42.1

chore: bump to v0.42.0-pre

chore: change an integration test to utilize generate_block_with_temp…

…late rpc

Merge nervosnetwork#2611

2611: improvement: smaller block status map during IBD r=driftluo,keroro520,quake a=yangby-cryptape

Not conflict with nervosnetwork#2609:

- This PR to make block status map to be smaller.

  After this PR, the max size of block status map during IBD: `4*10^6 -> 5*10^4` (current mainnet has about `4*10^6` blocks, and **I only test once**).

- nervosnetwork#2609 to cache block status map into disk if the size of block status map is bigger than a threshold (default: `10^6`, `1/4` of current mainchain).

  If this PR merged, nervosnetwork#2609 will not work in almost all scenarios at present.

  But I don't close it because:
  - The max size of block status map will be increased if network is poor or too many forked blocks.
  - We can set it to a smaller value, nervosnetwork#2609 provide an option.
  - That PR refactor the `HeaderMap` to `CachedHashMap`, so we can reuse the temporary storage for other `HashMap`s later.

Both of these two PRs could be merged.

Co-authored-by: Boyu Yang <[email protected]>

chore: use ckb-cli v0.40.0

chore: bump to v0.38.2

chore: bump to v0.40.0-rc2