Bug - Table - columns that are not sortable should not have aria-sort

[rhamilto]

Describe the problem
Per the latest W3C specifications and accessibility guidelines, the aria-sort attribute should only have values of “ascending”, “descending”, or “other” to indicate the sort order. If sorting does not exist for the column, no aria-sort attribute should be added.

patternfly-react/packages/react-table/src/components/Table/utils/decorators/sortable.tsx

Line 55 in 1850cf4

'aria-sort': isSortedBy ? `${sortBy.direction}ending` : 'none',

currently outputs a value of "none" for columns that are not sortable but should not.

How do you reproduce the problem?
In OpenShift Management Console, upgrade axe-core and cypress-axe to the latest versions, run other-routes.cy.ts, and note the aria-sort="none" accessibility failures.

Expected behavior
No aria-sort="none" accessibility issues should be present after upgrading axe-core and cypress-axe to the latest versions in OpenShift Management Console.

Is this issue blocking you?
Yes. We cannot upgrade axe-core and cypress-axe in OpenShift Management Console as a result of this bug, which in turn is blocking the ability to upgrade monaco-editor.

Screenshots

cc: @logonoff