fix(p2p): accept listener connection during bootstrap

[Freyskeyd]

Description

In order to safely initiate the bootnodes between each other, when receiving an incoming bootnode connection during bootstrap, dial back the bootnode.

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Attention: Patch coverage is 85.33333% with 22 lines in your changes are missing coverage. Please review.

Project coverage is 72.22%. Comparing base (5b6ddb8) to head (e6cb5cd).

Files	Patch %	Lines
crates/topos-p2p/src/runtime/handle_event/grpc.rs	46.87%	17 Missing ⚠️
crates/topos-p2p/src/runtime/handle_event.rs	94.59%	2 Missing ⚠️
crates/topos-p2p/src/tests/bootstrap.rs	92.85%	2 Missing ⚠️
...es/topos-p2p/src/runtime/handle_event/discovery.rs	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #484      +/-   ##
==========================================
+ Coverage   72.16%   72.22%   +0.05%     
==========================================
  Files         218      219       +1     
  Lines       12734    12829      +95     
==========================================
+ Hits         9190     9266      +76     
- Misses       3544     3563      +19     

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