feat: Adds property filter custom form actions test utils selectors

[pan-kot]

Description

Adding test util methods to find the Cancel and Submit buttons in the property filter custom form. The same methods are to be reused for multi-choice forms implemented here: #2739.

The new methods can be used as follows:

createWrapper().findPropertyFilter().findPropertyCancelButton().click()
createWrapper().findPropertyFilter().findPropertySubmitButton({ expandToViewport: true }).click()

That is similar to existing:

createWrapper().findPropertyFilter().findErrorRecoveryButton({ expandToViewport: true }).click()

How has this been tested?

• Updated existing unit tests

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.19%. Comparing base (8977aef) to head (2788f4c).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2840      +/-   ##
==========================================
- Coverage   96.20%   96.19%   -0.01%     
==========================================
  Files         761      761              
  Lines       21430    21434       +4     
  Branches     7271     7324      +53     
==========================================
+ Hits        20616    20619       +3     
- Misses        761      762       +1     
  Partials       53       53              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.