stratospher bc9283c441 [test] Add functional test to test early key response behaviour in BIP 324 ...

- A node initiates a v2 connection by sending 64 bytes ellswift
- In BIP 324 "The responder waits until one byte is received which does not match the
  V1_PREFIX (16 bytes consisting of the network magic followed by "version\x00\x00\x00\x00\x00".)"
- It's possible that the 64 bytes ellswift sent by an initiator starts with a prefix of V1_PREFIX
- Example form of 64 bytes ellswift could be:
	4 bytes network magic + 60 bytes which aren't prefixed with remaining V1_PREFIX
- We test this behaviour:
	- when responder receives 4 byte network magic -> no response received by initiator
	- when first mismatch happens -> response received by initiator

2024-01-25 11:12:15 +05:30

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