NEW: Added tests for Input Action Editor UI for managing action maps (ISX-2087)

[bmalrat]

Description

Added UI Toolkits test for the Input Action Editor. https://jira.unity3d.com/browse/ISX-2087 It tests list, creation, rename and delete.

Changes made

Fixed Action Maps name edition which could be inconsistent in Input Action Editor UI. The time used used was not the editor one and the UI was destroyed and recreated on each change.

Testing

local test on windows + CI

Risk

limited to Input Action Editor UI.

Checklist

Before review:

• [X] Changelog entry added.
  • Explains the change in Changed, Fixed, Added sections.
  • For API change contains an example snippet and/or migration example.
  • JIRA ticket linked, example (case %%). If it is a private issue, just add the case ID without a link.
  • Jira port for the next release set as "Resolved".
• [ ] Tests added/changed, if applicable.
  • Functional tests Area_CanDoX, Area_CanDoX_EvenIfYIsTheCase, Area_WhenIDoX_AndYHappens_ThisIsTheResult.
  • Performance tests.
  • Integration tests.
• [ ] Docs for new/changed API's.
  • Xmldoc cross references are set correctly.
  • Added explanation how the API works.
  • Usage code examples added.
  • The manual is updated, if needed.

During merge:

• [ ] Commit message for squash-merge is prefixed with one of the list:
  • NEW: ___.
  • FIX: ___.
  • DOCS: ___.
  • CHANGE: ___.
  • RELEASE: 1.1.0-preview.3.

After merge:

• [ ] Create forward/backward port if needed. If you are blocked from creating a forward port now please add a task to ISX-1444.