Add support for axfr_ips and PTR records in Linode DNS v4

[ChihweiLHBird]

Add support for axfr_ips and PTR records in Linode DNS v4

Description

This branch is based on #2132 so the v3 is removed. I can rebase it atfer #2132 is merged to shorten the diff.

Add axfr_ips parameter to zone creation, PTR record type support, and CAA tag preservation in Linode DNS v4 driver. Includes corresponding tests and fixtures.

Status

Done, waiting for #2132 merged to be ready for review

Checklist (tick everything that applies)

• Code linting (required, can be done after the PR checks)
• Documentation
• Tests
• ICLA (required for bigger changes)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 97.14286% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 83.37%. Comparing base (f3af38f) to head (b0c09db).

Files with missing lines	Patch %	Lines
libcloud/test/dns/test_linode_v4.py	96.77%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            trunk    #2134    +/-   ##
========================================
  Coverage   83.36%   83.37%            
========================================
  Files         353      351     -2     
  Lines       81906    81225   -681     
  Branches     9007     8937    -70     
========================================
- Hits        68278    67714   -564     
+ Misses      10799    10721    -78     
+ Partials     2829     2790    -39     

Files with missing lines	Coverage Δ
libcloud/common/linode.py	95.83% <ø> (+8.20%)	⬆️
libcloud/compute/drivers/linode.py	72.28% <100.00%> (+3.32%)	⬆️
libcloud/dns/drivers/linode.py	77.57% <100.00%> (-5.24%)	⬇️
libcloud/test/compute/test_linode_v4.py	97.98% <100.00%> (+0.01%)	⬆️
libcloud/test/dns/test_linode_v4.py	97.02% <96.77%> (-0.06%)	⬇️

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