a11y: 'Value' textfield in authorizations modal is not associated with label

[nwpappas]

Q&A (please complete the following information)

• OS: all
• Browser: all

Describe the bug you're encountering

Label 'Value' is not associated with their respective form field. Screen reader only announces it 'Edit blank'.

To reproduce...

Steps to reproduce the behavior:

1. Open URL: https://petstore.swagger.io/
2. Navigate on 'Authorize' button
3. 'Available authorizations' section appeared. Navigate on 'Value' edit field
4. Press F12 to open the developer tool
5. Verify that Label 'Value' should be associated with their respective form field or not.

Expected behavior

Label 'Value' should be associated with their respective form field.

Screenshots

Additional context or thoughts

In the absence of label information for form elements, then users dependence with screen reader are not able to understand the purpose of UI component and could give-up to use the functionality.

[glowcloud]

Addressed in #9599