PADV-1871: Fix the Annotatorjs resize feature for the textarea

[Serafin-dev]

Description

This PR aims to solve an Annotatorjs bug that prevents the editor's textarea from being resized correctly.
For that a custom behaviour was developed that overrides annotatorjs behaviour.

Related tickets

https://agile-jira.pearson.com/projects/PADV/issues/PADV-1871

Type of change

• Make possible to resize the textarea of the Annotatorjs Editor.

How to test

• Setup an Olive Devstack openedx instance and run lms, studio and frontend-app-learning.
• Setup edx-notes.
• Enable comprehensive theming.
• Compile themes
• Add the pearson-theme to a site
• Select text from a course content
• Click the notes button to open the annotators modal
• Resize by clicking the draggable and moving the mouse in the desired direction.

Reviewers

• @alexjmpb
• @Squirrel18