p2p: upgrade libp2p

[algorandskiy]

Summary

Upgraded go-libp2p, go-libp2p-pubsub, go-libp2p-pubsub to the latest versions supporting go1.21 (go-libp2p is one patch version behind).

Fixed *basichost.BasicHost casting since libp2p.New does not return *basichost.BasicHost anymore.
Fixed private addresses test:

• /ip6/2001:db8::/ipcidr/32 is supported natively by multiaddr lib (i.e. fixed a known TODO item)
• /ip6/200:11::/tcp/1234 ended up to be a bad example for testing public IPv6 addresses after some improvements in multiaddr

Extra upgrades

Upgrading libp2p also triggered some other dependencies upgrades, notable golang.org/x/crypto v0.21 -> v0.26.
go-algorand directly uses acme/autocert,, blake2b, sha3, hkdf, nacl/secretbox and scrypt submodules.
The 4 latter (sha3 ... scrypt) might potentially affect on-chain data through AVM and kmd.

Version history v0.21 -> v0.26 shows only sha3 was changed and both changes (xor, buf) looks good/safe.

Test Plan

Existing unit tests. Performance test showed some regression but we have to upgrade anyway.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 56.27%. Comparing base (2a02530) to head (29da8cb).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
network/p2p/p2p.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6142      +/-   ##
==========================================
- Coverage   56.27%   56.27%   -0.01%     
==========================================
  Files         494      494              
  Lines       69943    69946       +3     
==========================================
+ Hits        39358    39359       +1     
- Misses      27910    27916       +6     
+ Partials     2675     2671       -4     

Flag	Coverage Δ
	56.27% <0.00%> (?)

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