feat(a11y): update type tests after review

src/components/Popover/Popover.typetest.ts

@@ -4,9 +4,25 @@ import { ExpectExtends, Expect, ExpectFalse } from '../../utils/typetest.util';
 // NOTE: STATIC TYPE TESTS RUN ON LINT
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
 type cases = [
-  // if there is a close button, there must be a closeButtonProps aria-label
+  // closeButtonProps must always contain aria-label
+  // if there is no close button, closeButtonProps is optional
   Expect<ExpectExtends<PopoverCloseButtonProps, Record<string, never>>>,
   Expect<ExpectExtends<PopoverCloseButtonProps, { closeButtonPlacement: 'none' }>>,
+  Expect<
+    ExpectExtends<
+      PopoverCloseButtonProps,
+      { closeButtonPlacement: 'none'; closeButtonProps: { 'aria-label': 'abc' } }
+    >
+  >,
+  ExpectFalse<
+    ExpectExtends<
+      PopoverCloseButtonProps,
+      { closeButtonPlacement: 'none'; closeButtonProps: Record<string, never> }
+    >
+  >,
+
+  // closeButtonProps must always contain aria-label
+  // if there is a close button, closeButtonProps is required
   ExpectFalse<ExpectExtends<PopoverCloseButtonProps, { closeButtonPlacement: 'top-left' }>>,
   ExpectFalse<ExpectExtends<PopoverCloseButtonProps, { closeButtonPlacement: 'top-right' }>>,
   ExpectFalse<