Wagtail 4.2 upgrade

[katdom13]

• Update testing to accommodate Wagtail 4.2

[codecov-commenter]

Codecov Report

Base: 91.61% // Head: 93.05% // Increases project coverage by +1.43% 🎉

Coverage data is based on head (146b4e1) compared to base (1fc56b0).
Patch coverage: 99.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #673      +/-   ##
==========================================
+ Coverage   91.61%   93.05%   +1.43%     
==========================================
  Files          47       47              
  Lines        4008     3929      -79     
  Branches      609      581      -28     
==========================================
- Hits         3672     3656      -16     
+ Misses        201      161      -40     
+ Partials      135      112      -23     

Impacted Files	Coverage Δ
wagtail_localize/test/settings.py	100.00% <ø> (ø)
wagtail_localize/compat.py	81.25% <66.66%> (+29.39%)	⬆️
wagtail_localize/components.py	85.71% <100.00%> (+3.02%)	⬆️
wagtail_localize/fields.py	92.59% <100.00%> (+1.52%)	⬆️
wagtail_localize/locales/forms.py	100.00% <100.00%> (ø)
wagtail_localize/locales/tests.py	100.00% <100.00%> (ø)
wagtail_localize/locales/utils.py	100.00% <100.00%> (ø)
wagtail_localize/locales/views.py	93.37% <100.00%> (ø)
wagtail_localize/locales/wagtail_hooks.py	94.73% <100.00%> (ø)
wagtail_localize/modeladmin/helpers.py	100.00% <100.00%> (ø)
... and 19 more

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[zerolab]

A few more tweaks and we should be there

[zerolab]

This is taking great shape. Thank you for your effort, @katdom13

Left a number of further cleanup needed, plus the main migration should not be changed.

In additional to that,
https://github.com/wagtail/wagtail-localize/tree/146b4e15bfc50974dddabe424765c3ae85028768/wagtail_localize/static_src/legacy needs to go since it is 2.x, as well as

wagtail-localize/wagtail_localize/static_src/editor/main.tsx

Line 4 in 1fc56b0

import LegacyTranslationEditor from '../legacy/editor/components/TranslationEditor';

needs to be upadte (remove the legacy import and the has_legacy_styling conditional (

wagtail-localize/wagtail_localize/static_src/editor/main.tsx

Lines 20 to 22 in 1fc56b0

	if (props.has_legacy_styling) {
	Component = LegacyTranslationEditor;
	}

)

[katdom13]

The latest commit aa2c0c4 updates the workflow to use tox-gh-actions as suggested by Nick Moreton.
This approach eliminates the redundancy of duplicating the test configuration within the workflow, with tox.ini serving as the sole method of configuring the test matrix.