fix(nav): Reverts PR #10644 that caused regression (#11099)

* fix(nav):  Reverts PR #10644 that caused regression

* fix failing snapshot tests

Author: tlabaj

packages/react-core/src/components/ExpandableSection/__tests__/__snapshots__/ExpandableSection.test.tsx.snap

@@ -58,6 +58,7 @@ exports[`Disclosure ExpandableSection 1`] = `
   >
     <button
       aria-controls="content-id"
+      aria-expanded="false"
       class="pf-v5-c-expandable-section__toggle"
       id="toggle-id"
       type="button"
@@ -103,6 +104,7 @@ exports[`ExpandableSection 1`] = `
   >
     <button
       aria-controls="content-id"
+      aria-expanded="false"
       class="pf-v5-c-expandable-section__toggle"
       id="toggle-id"
       type="button"
@@ -238,6 +240,7 @@ exports[`Renders Uncontrolled ExpandableSection 1`] = `
   >
     <button
       aria-controls="content-id"
+      aria-expanded="false"
       class="pf-v5-c-expandable-section__toggle"
       id="toggle-id"
       type="button"

packages/react-core/src/helpers/resizeObserver.tsx

@@ -1,4 +1,4 @@
-import { canUseDOM, debounce } from './util';
+import { canUseDOM } from './util';
 
 /**
  * This function creates a ResizeObserver used to handle resize events for the given containerRef. If ResizeObserver
@@ -83,7 +83,7 @@ export const getResizeObserver = (
         if (useRequestAnimationFrame) {
           window.requestAnimationFrame(() => {
             if (Array.isArray(entries) && entries.length > 0) {
-              debounce(handleResize, 100);
+              handleResize();
             }
           });
           // Avoid wrapping function in requestAnimationFrame if the function is debounced