WIP: RPC Auth

[cdnsteve]

Do not merge, this is a work in progress.

What does this PR do?

• This PR addresses issue Implement RPC authentication #1893
• Adds new config flag rpcauth as string, defaults to: none but optional tls

An early sneak peak, existing tests passing but lots more to go.

To Do:

• Create cert and key file and ensure it works, test flags for rpckey rpccert
• Validate miner is able to connect using TLS
• Add TLS to rpcClient (this is currently just for server)
• Make list of other commands to confirm TLS is active, kaspa utils?
• Refactor some of this sample code and cleanup
• Create new tests

[codecov]

Codecov Report

Merging #2090 (3f52480) into dev (c5aade7) will decrease coverage by 0.00%.
The diff coverage is 57.69%.

❗ Current head 3f52480 differs from pull request most recent head b9be56a. Consider uploading reports for the commit b9be56a to get more accurate results

@@            Coverage Diff             @@
##              dev    #2090      +/-   ##
==========================================
- Coverage   59.24%   59.23%   -0.01%     
==========================================
  Files         678      678              
  Lines       32767    32781      +14     
==========================================
+ Hits        19413    19419       +6     
- Misses      10554    10560       +6     
- Partials     2800     2802       +2     

Impacted Files	Coverage Δ
...etwork/netadapter/server/grpcserver/grpc_server.go	70.58% <47.61%> (-9.97%)	⬇️
infrastructure/config/config.go	12.79% <100.00%> (+0.33%)	⬆️
infrastructure/network/netadapter/netadapter.go	75.58% <100.00%> (ø)
.../network/netadapter/server/grpcserver/p2pserver.go	69.69% <100.00%> (ø)
.../network/netadapter/server/grpcserver/rpcserver.go	100.00% <100.00%> (ø)
.../protocol/flows/v5/blockrelay/handle_relay_invs.go	53.84% <0.00%> (+1.21%)	⬆️

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