Align Core-AAM with ARIA PR 1802 issue 1730
change aria-errormessage to take multiple element references

IA2 and ATK/AT-SPI already point to multiple nodes
update UIA to have ControllerFor point to an array of references to accessibility nodes

@cookiecrook need text for AX API. Assign back to me with text
Old text is
AX API | Property: AXValidationError: textual content of the referenced element