googlec2p: use xdstp style template for client LDS resource name

[arvindbr8]

The google c2p resolver should be using the new xdstp style names for LDS resource names. Also adds "xds.config.resource-in-sotw" to server_features which is also required by the google c2p resolver.

RELEASE NOTES: none

[codecov]

Codecov Report

Merging #7048 (81866ee) into master (dadbbfa) will increase coverage by 0.03%.
Report is 2 commits behind head on master.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7048      +/-   ##
==========================================
+ Coverage   82.45%   82.49%   +0.03%     
==========================================
  Files         299      300       +1     
  Lines       31314    31351      +37     
==========================================
+ Hits        25819    25862      +43     
+ Misses       4435     4431       -4     
+ Partials     1060     1058       -2     

Files	Coverage Δ
xds/googledirectpath/googlec2p.go	84.70% <100.00%> (+0.18%)	⬆️

... and 23 files with indirect coverage changes