[A11y][Fastpass] Remove aria-expanded attribute where not allowed

[keylime-unicorn]

Removed the aria-expanded attribute from the following div elements:

URL: https://www.nuget.org/packages/manage/upload

• #verify-package-block
• #import-readme-block
• #submit-block

Addresses #9320

[joelverhagen]

How did we decide on removing the attributes rather than adding additional attributes to make the situation compliant? From the document linked in the issue (https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-expanded#:~:text=The%20aria-expanded%20indicates%20to%20assistive%20technology%20whether%20the,on%20the%20elements%20that%20own%20expandable%20grouping%20containers) it seems like we may need an aria-controls or some other additional attribute to make things work? Generally, this seems to be making the DOM less descriptive of the visible page state rather than more so I wonder if this is the right approach.

[keylime-unicorn]

@joelverhagen So I noticed that there is an element within this div element that also has the aria-expanded label and actually changes it between true and false when the element is collapsed and expanded. This instance of the aria-expanded attribute seems redundant and essentially seems to serve no purpose other than throwing this error. So it seems to me that this outer div doesn't need the aria-expanded attribute since it is not the element actually being expanded and collapsed. Although I could be wrong with my analysis.

@ryuyu Thoughts?

[ryuyu]

Since the element this is being removed from is not actually the interactable element, I am fairly certain that this is the correct fix.