DNS: fix cname cross zone

[BeryJu]

Fix CNAME lookups across zones...thanks @tigattack

[netlify]

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Name	Link
🔨 Latest commit	9e77c06
🔍 Latest deploy log	https://app.netlify.com/sites/beryju-gravity/deploys/673fcc39084dbf000889833d

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 10 lines in your changes missing coverage. Please review.

Project coverage is 21.83%. Comparing base (0e1d858) to head (9e77c06).
Report is 1 commits behind head on main.

❌ We are unable to process any of the uploaded JUnit XML files. Please ensure your files are in the right format.

Files with missing lines	Patch %	Lines
pkg/roles/dns/dns_handler.go	47.05%	8 Missing and 1 partial ⚠️
pkg/roles/dns/handler_etcd.go	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1306      +/-   ##
==========================================
+ Coverage   21.72%   21.83%   +0.11%     
==========================================
  Files         232      232              
  Lines       19836    19861      +25     
==========================================
+ Hits         4309     4337      +28     
+ Misses      15075    15073       -2     
+ Partials      452      451       -1     

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