[Networking] Revising RPC inspector metrics

[yhassanzadeh13]

This PR makes these updates to RPC inspector metrics:

1. Integrates the RPC metrics inspector with the RPC validation inspector. This unifies metrics collection, allowing more accurate and post-validation insights, such as RPC truncation and message ID types.
2. Removes unused metrics like RPC acceptance, and adds new metrics for RPC truncation.
3. Streamlines truncation logic, promptly failing short RPCs without unnecessary steps.

Note: The PR maintains existing metrics for backward compatibility, only modifying the addition, removal, and collection points of some metrics.

[codecov-commenter]

Codecov Report

Attention: 119 lines in your changes are missing coverage. Please review.

Comparison is base (a1b17ac) 56.48% compared to head (db107e1) 56.51%.

Files	Patch %	Lines
...dule/metrics/gossipsub_rpc_validation_inspector.go	0.00%	81 Missing ⚠️
...validation/control_message_validation_inspector.go	75.86%	16 Missing and 5 partials ⚠️
module/metrics/noop.go	0.00%	17 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5172      +/-   ##
==========================================
+ Coverage   56.48%   56.51%   +0.02%     
==========================================
  Files         981      979       -2     
  Lines       93127    93094      -33     
==========================================
+ Hits        52602    52608       +6     
+ Misses      36632    36589      -43     
- Partials     3893     3897       +4     

Flag	Coverage Δ
unittests	56.51% <35.67%> (+0.02%)	⬆️

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