Fix/aut 3923/textreader image figure support

[olga-kulish]

Related to https://oat-sa.atlassian.net/browse/AUT-3923

Changes

1. textReaderInteraction.scss
   Position "remove" icon for Figure. Same style is used in taoQtiItem-->item-creator.css for inline widgets.

2. Question.js
   Set data-element-support-figure - this is needed for Fix/aut 3923/textreader image figure support extension-tao-itemqti#2613 where we check if <figure> is supported (if it's not supported, wrap-left/wrap-right will be applied directly to <img>).
   In pratice the difference is whether figcaption is available or not. So we could remove this data attribute for simplicity, and just disable <figure> for all PCIs.

3. renderer.js
   Since usual renderers of QTI elements don't run in PCI, we need to copy this functionality inside PCI. Maybe this should be moved to portableLib. Need to remove qh5: namespace too.

Notes

When I click on Figure in CkEditor, there's an error:

Uncaught TypeError: Cannot read properties of undefined (reading 'p')
    at CKEDITOR.dom.elementPath.isContextFor (ckeditor.js?buster=67281c6ecaeb3:509:149)
    at CKEDITOR.command.refresh (ckeditor.js?buster=67281c6ecaeb3:209:273)
    at m (ckeditor.js?buster=67281c6ecaeb3:265:233) ...

I have no idea how to fix it yet. Looks harmless, so let's ignore it?
To get rid of it, we can sacrifice figcaption and disable <figure> support (and apply wrap class directly on <img>).

To test

On unit05. Related PRs:

• Fix/aut 3923/textreader image figure support tao-core#4125
• Fix/aut 3923/textreader image figure support tao-core-ui-fe#606
• Fix/aut 3923/textreader image figure support #172
• Fix/aut 3923/textreader image figure support extension-tao-itemqti#2613