p2p: Telemetry and metrics improvements

[algorandskiy]

Summary

1. Added EnableP2P and EnableP2PHybridMode to the telemetry Startup event. This will allow to see fractions of WS, P2P and Hybrid nodes.
2. Added pubsubTracer.SendRPC implementation to track TX messages being broadcasted over the network. These will be the same as algod_network_sent_bytes_TX and algod_network_message_sent_TX.

This is part 1 of a bigger change to separate metrics like algod_network_sent_bytes_{TAG} for ws and p2p networks. The newly added algod_transaction_messages_p2p_sent will be replaced by algod_network_message_sent_TX but this requires moving all of these into the util/metrics to be used in both network package and network/p2p sub-packages. This would also allow to write a simple unit test for gossipsub metric (having the counter available in the node or network package).

Test Plan

Tested locally with goal network + pingpong + test/heapwatch/heapWatch.py --period 10 --metrics

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 56.21%. Comparing base (8e2e2e4) to head (02b5eeb).

Files	Patch %	Lines
network/p2p/pubsubTracer.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6104      +/-   ##
==========================================
- Coverage   56.22%   56.21%   -0.02%     
==========================================
  Files         490      490              
  Lines       69705    69710       +5     
==========================================
- Hits        39191    39186       -5     
- Misses      27840    27851      +11     
+ Partials     2674     2673       -1     

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[algorandskiy]

Fixed SendRPC checks

[cce]

other than Publish[i] LGTM

[algorandskiy]

Closing, #6105 has all of it and much more.