test(e2e): add testing for external chain migration

[lumtis]

Description

The test spinup another EVM network, initialize the first one first then try initializing the second, adding it as supported chain and removing support for first chain.

Closes: #1896

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[github-actions]

!!!WARNING!!!
nosec detected in the following files: cmd/zetae2e/local/accounts.go, e2e/e2etests/e2etests.go

Be very careful about using #nosec in code. It can be a quick way to suppress security warnings and move forward with development, it should be employed with caution. Suppressing warnings with #nosec can hide potentially serious vulnerabilities. Only use #nosec when you're absolutely certain that the security issue is either a false positive or has been mitigated in another way.

Only suppress a single rule (or a specific set of rules) within a section of code, while continuing to scan for other problems. To do this, you can list the rule(s) to be suppressed within the #nosec annotation, e.g: /* #nosec G401 */ or //#nosec G201 G202 G203
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[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 63.91%. Comparing base (f845afc) to head (59325b2).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1900   +/-   ##
========================================
  Coverage    63.90%   63.91%           
========================================
  Files          236      236           
  Lines        13631    13639    +8     
========================================
+ Hits          8711     8717    +6     
- Misses        4504     4505    +1     
- Partials       416      417    +1     

Files	Coverage Δ
x/observer/keeper/msg_server_reset_chain_nonces.go	100.00% <ø> (ø)
zetaclient/config/config_chain.go	0.00% <ø> (ø)
zetaclient/evm/evm_signer.go	48.44% <ø> (ø)
x/crosschain/keeper/msg_server_whitelist_erc20.go	81.66% <75.00%> (-0.48%)	⬇️

[skosito]

lgtm, approved with 2 small comments, please check if they make sense

[lumtis]

lgtm, approved with 2 small comments, please check if they make sense

Implemented the suggestion