fix(material/slider): fix slider resize w/ transforms (#26044)

* Fixes Issue #26043

Author: wagnermaciel

src/material/slider/slider.ts

@@ -573,9 +573,8 @@ export class MatSlider
 
   /** Stores the slider dimensions. */
   _updateDimensions(): void {
-    const rect = this._elementRef.nativeElement.getBoundingClientRect();
-    this._cachedWidth = rect.width;
-    this._cachedLeft = rect.left;
+    this._cachedWidth = this._elementRef.nativeElement.offsetWidth;
+    this._cachedLeft = this._elementRef.nativeElement.getBoundingClientRect().left;
   }
 
   /** Sets the styles for the active portion of the track. */