internal: Migrate all v2 xDS resource versions to v3 for package internal/envoy/v3

[stevesloka]

Updates #1898

[codecov]

Codecov Report

Merging #3118 (c72650a) into main (18fbcf8) will increase coverage by 1.23%.
The diff coverage is 82.18%.

@@            Coverage Diff             @@
##             main    #3118      +/-   ##
==========================================
+ Coverage   73.29%   74.53%   +1.23%     
==========================================
  Files         103      112       +9     
  Lines        6190     7045     +855     
==========================================
+ Hits         4537     5251     +714     
- Misses       1552     1686     +134     
- Partials      101      108       +7     

Impacted Files	Coverage Δ
internal/envoy/v3/tls.go	0.00% <0.00%> (ø)
internal/envoy/v3/endpoint.go	84.21% <62.50%> (-15.79%)	⬇️
internal/envoy/v3/listener.go	67.28% <64.37%> (+21.83%)	⬆️
internal/envoy/v3/cluster.go	80.80% <77.98%> (-19.21%)	⬇️
internal/envoy/v3/route.go	87.70% <87.70%> (ø)
internal/sorter/sorter.go	91.86% <92.37%> (-3.42%)	⬇️
internal/envoy/v3/accesslog.go	100.00% <100.00%> (ø)
internal/envoy/v3/auth.go	100.00% <100.00%> (ø)
internal/envoy/v3/healthcheck.go	100.00% <100.00%> (ø)
internal/envoy/v3/regex.go	100.00% <100.00%> (ø)
... and 15 more

[skriss]

This LGTM. I've been working on updating the internal/xdscache code for v3, and I was able to get those changes to compile after rebasing on this branch, so that's another validation that this is 👍 .

I'd like to follow up with some more cleanup on import aliases, but prefer to do that separately.

[stevesloka]

@skriss I added the tls.go to this PR. Once it passes CI I'll merge it and then can review your xdscache branch.