[WebGPU] Fix shader key for ScatterProgram (#7932)

* Add uniforms

* Update webgpu_program.ts

* Update webgpu_program.ts

* Revert "Add uniforms"

This reverts commit 645802f.

* Revert "Update webgpu_program.ts"

This reverts commit 58ea96f.

* Revert "Update webgpu_program.ts"

This reverts commit 32386ac.

* Add key to scatter webgpu program

Author: Linchenn

tfjs-backend-webgpu/src/scatter_webgpu.ts

@@ -48,8 +48,9 @@ export class ScatterProgram implements WebGPUProgram {
     this.dispatch =
         computeDispatch(this.dispatchLayout, flattenXShape, this.workgroupSize);
     this.sliceDimGreaterThanOne = sliceDim > 1;
-    this.shaderKey = `scatter_${indicesRank}_${updatesRank}_${
-        this.sliceDimGreaterThanOne}_${outputDtype}_${sumDupeIndices}`;
+    this.shaderKey =
+        `scatter_${indicesRank}_${updatesRank}_${this.sliceDimGreaterThanOne}_${
+            outputDtype}_${sumDupeIndices}_${strides.length}`;
     const stridesType = getCoordsDataType(strides.length);
     this.uniforms =
         `sliceDim : i32, strides: ${stridesType}, updatesSize: i32,`;