xds: change cdsbalancer to use dependency manager and remove clusterresolver

[eshitachandwani]

Part of A74 changes. This PR changes the cdsbalancer to use the XDSConfig for resources and remove the cluster watcher from cds balancer.
Also removes the EDS/DNS watchers from the balancers and remove cluster resolver policy completely.

Note : Also includes changes from #8744 , will be removed after the PR is merged.
RELEASE NOTES:

• xds:
  • Ambient error for cluster resource will now only be logged in dependency manager and not propagated to LB policies.
  • When a re-resolution is requested, all the LOGICAL_DNS type clusters will be re-resolved as opposed to just one.

[codecov]

Codecov Report

❌ Patch coverage is 75.53648% with 57 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.26%. Comparing base (4046676) to head (76fbed3).

Files with missing lines	Patch %	Lines
internal/xds/balancer/cdsbalancer/cdsbalancer.go	67.10%	33 Missing and 17 partials ⚠️
internal/xds/xdsdepmgr/xds_dependency_manager.go	88.63%	4 Missing and 1 partial ⚠️
internal/xds/balancer/cdsbalancer/configbuilder.go	93.54%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8777      +/-   ##
==========================================
- Coverage   83.42%   83.26%   -0.16%     
==========================================
  Files         418      411       -7     
  Lines       32897    32524     -373     
==========================================
- Hits        27443    27080     -363     
+ Misses       4069     4062       -7     
+ Partials     1385     1382       -3     

Files with missing lines	Coverage Δ
balancer/pickfirst/pickfirst.go	89.11% <100.00%> (ø)
...ds/balancer/cdsbalancer/configbuilder_childname.go	100.00% <ø> (ø)
internal/xds/clusterspecifier/rls/rls.go	62.50% <100.00%> (ø)
internal/xds/resolver/xds_resolver.go	88.88% <100.00%> (+0.12%)	⬆️
internal/xds/balancer/cdsbalancer/configbuilder.go	93.15% <93.54%> (ø)
internal/xds/xdsdepmgr/xds_dependency_manager.go	88.57% <88.63%> (+7.70%)	⬆️
internal/xds/balancer/cdsbalancer/cdsbalancer.go	73.29% <67.10%> (-12.04%)	⬇️

... and 36 files with indirect coverage changes

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[easwars]

The test is still failing.