Upgrade golangci-lint, more linters

[joeturki]

Description

This PR introduces new linters and resolves issues with the latest golangci-lint version (v1.63.4).

Reference issue

pion/.goassets#220

[codecov]

Codecov Report

Attention: Patch coverage is 67.45182% with 152 lines in your changes missing coverage. Please review.

Project coverage is 66.14%. Comparing base (7a3d4d2) to head (5b58083).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/server/turn.go	59.77%	54 Missing and 16 partials ⚠️
internal/server/server.go	31.25%	21 Missing and 1 partial ⚠️
internal/server/util.go	51.61%	10 Missing and 5 partials ⚠️
lt_cred.go	50.00%	12 Missing ⚠️
internal/client/udp_conn.go	82.22%	7 Missing and 1 partial ⚠️
client.go	50.00%	6 Missing ⚠️
internal/client/allocation.go	16.66%	5 Missing ⚠️
relay_address_generator_range.go	0.00%	4 Missing ⚠️
server.go	85.00%	3 Missing ⚠️
internal/allocation/allocation.go	92.30%	2 Missing ⚠️
... and 4 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #432      +/-   ##
==========================================
- Coverage   66.94%   66.14%   -0.80%     
==========================================
  Files          43       43              
  Lines        2919     3084     +165     
==========================================
+ Hits         1954     2040      +86     
- Misses        801      877      +76     
- Partials      164      167       +3     

Flag	Coverage Δ
go	66.14% <67.45%> (-0.80%)	⬇️
wasm	26.58% <15.41%> (-0.55%)	⬇️

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[joeturki]

LGTM (triple-reviewed it)!