fix(checkbox): use label-color-hover for all themes

[didimmova]

Related to this issue

Additional information (check all that apply):

• Bug fix
• New functionality
• Documentation
• Demos
• CI/CD

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them

[SisIvanova]

@didimmova Check indeterminate hover, invalid hover, and invalid checked hover states in Material theme. Bootstrap and Fluent theme - invalid hover label color. Fluent theme - all indeterminate states (hover, invalid hover, invalid disabled), invalid checked disabled state. Indigo theme - indeterminate focused and indeterminate invalid disabled state.