feat(dns): NSX DNS record service and zone validation

[wenyingd]

1. Introduce a new nsx service to support creating/updating/deleting DNS records in NSX.
2. Introduce mock types for DNS record related clients.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 89.11820% with 116 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.59%. Comparing base (ff79596) to head (c882eb5).

Files with missing lines	Patch %	Lines
pkg/nsx/services/dns/recordservice.go	79.62%	34 Missing and 20 partials ⚠️
pkg/nsx/services/dns/store.go	94.19%	7 Missing and 6 partials ⚠️
pkg/nsx/services/dns/compare.go	84.00%	9 Missing and 3 partials ⚠️
pkg/nsx/services/dns/zones.go	88.77%	6 Missing and 5 partials ⚠️
pkg/nsx/services/common/wrap.go	73.33%	2 Missing and 2 partials ⚠️
pkg/nsx/services/dns/builder.go	94.73%	2 Missing and 2 partials ⚠️
pkg/nsx/services/dns/cleanup.go	73.33%	2 Missing and 2 partials ⚠️
pkg/nsx/services/dns/contributing.go	94.59%	2 Missing and 2 partials ⚠️
pkg/nsx/services/dns/initialize.go	88.57%	2 Missing and 2 partials ⚠️
pkg/clean/clean.go	71.42%	1 Missing and 1 partial ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1423      +/-   ##
==========================================
+ Coverage   77.02%   77.59%   +0.56%     
==========================================
  Files         156      169      +13     
  Lines       22048    23108    +1060     
==========================================
+ Hits        16983    17930     +947     
- Misses       3859     3926      +67     
- Partials     1206     1252      +46     

Flag	Coverage Δ
unit-tests	77.59% <89.11%> (+0.56%)	⬆️

Files with missing lines	Coverage Δ
pkg/nsx/client.go	93.42% <100.00%> (+0.11%)	⬆️
pkg/nsx/services/common/policy_tree.go	86.48% <100.00%> (+0.24%)	⬆️
pkg/nsx/services/common/types.go	100.00% <ø> (ø)
pkg/nsx/services/dns/errors.go	100.00% <100.00%> (ø)
pkg/nsx/services/dns/types.go	100.00% <100.00%> (ø)
pkg/third_party/externaldns/endpoint/endpoint.go	100.00% <100.00%> (ø)
pkg/util/utils.go	87.12% <100.00%> (+0.12%)	⬆️
pkg/clean/clean.go	86.88% <71.42%> (-0.95%)	⬇️
pkg/third_party/externaldns/endpoint/utils.go	90.47% <90.47%> (ø)
pkg/third_party/externaldns/provider/zonefinder.go	90.90% <90.90%> (ø)
... and 9 more

... and 1 file with indirect coverage changes

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[TaoZou1]

Please add enough UT later.

[wenyingd]

/e2e