feat(vary-cache): allow for customizing cookie path and domain

[sjinks]

Description

Fixes: #5531

Changelog Description

Added

It is now possible to customize the cookie path and domain for the cookies set by the Vary Cache plugin. To achieve that, we introduced two new filters: vip_vary_cache_cookie_path and vip_vary_cache_cookie_domain.

Pre-review checklist

Please make sure the items below have been covered before requesting a review:

• This change works and has been tested locally or in Codespaces (or has an appropriate fallback).
• This change works and has been tested on a sandbox.
• This change has relevant unit tests (if applicable).
• This change uses a rollout method to ease with deployment (if applicable - especially for large scale actions that require writes).
• This change has relevant documentation additions / updates (if applicable).
• I've created a changelog description that aligns with the provided examples.

Pre-deploy checklist

• VIP staff: Ensure any alerts added/updated conform to internal standards (see internal documentation).

Steps to Test

See #5531.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29.43%. Comparing base (e52f028) to head (594f46d).

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #5552      +/-   ##
=============================================
+ Coverage      29.41%   29.43%   +0.02%     
  Complexity      4759     4759              
=============================================
  Files            281      281              
  Lines          20533    20523      -10     
=============================================
+ Hits            6039     6041       +2     
+ Misses         14494    14482      -12     

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