internal/featuretests: Move xDS version v2 to v3 features tests

[stevesloka]

Updates #1898

Signed-off-by: Steve Sloka slokas@vmware.com

[codecov]

Codecov Report

Merging #3124 (9419e61) into main (a84d14d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #3124   +/-   ##
=======================================
  Coverage   76.24%   76.24%           
=======================================
  Files         117      117           
  Lines        7577     7578    +1     
=======================================
+ Hits         5777     5778    +1     
- Misses       1670     1671    +1     
+ Partials      130      129    -1     

Impacted Files	Coverage Δ
internal/featuretests/v3/httpproxy.go	100.00% <ø> (ø)
internal/featuretests/v3/envoy.go	100.00% <100.00%> (ø)
internal/featuretests/v3/featuretests.go	90.10% <100.00%> (ø)
internal/xdscache/v3/listener.go	95.13% <100.00%> (+3.28%)	⬆️
internal/envoy/v2/tls.go	77.77% <0.00%> (-22.23%)	⬇️
internal/envoy/v2/cluster.go	82.92% <0.00%> (-17.08%)	⬇️
internal/xdscache/v2/cluster.go	87.87% <0.00%> (-12.13%)	⬇️
internal/envoy/v2/listener.go	86.24% <0.00%> (-10.79%)	⬇️
internal/xdscache/v2/secret.go	89.74% <0.00%> (-10.26%)	⬇️
internal/xdscache/v2/route.go	81.89% <0.00%> (-9.49%)	⬇️
... and 17 more

[skriss]

this LGTM. I mainly checked for any remaining v2 refs (there were none) and visually scanned the rest.

Just confirming that we're ready to delete the v2 tests? I think it's fine as we're about ready to start deleting all the v2 code, but just double-checking.

[stevesloka]

Just confirming that we're ready to delete the v2 tests?

Yup! Next we should be able to just drop all the v2 bits.