feat: fix tensor class import (#7947)

Co-authored-by: Ping Yu <[email protected]>

Author: paradite

tfjs-core/src/tensor_util_env.ts

@@ -17,7 +17,7 @@
 
 import {ENGINE} from './engine';
 import {env} from './environment';
-import {Tensor} from './tensor';
+import {getGlobalTensorClass, Tensor} from './tensor';
 import {DataType, isWebGLData, isWebGPUData, TensorLike, WebGLData, WebGPUData} from './types';
 import {assert, flatten, inferDtype, isTypedArray, toTypedArray} from './util';
 import {bytesPerElement} from './util_base';
@@ -98,7 +98,7 @@ function assertDtype(
 export function convertToTensor<T extends Tensor>(
     x: T|TensorLike, argName: string, functionName: string,
     parseAsDtype: DataType|'numeric'|'string_or_numeric' = 'numeric'): T {
-  if (x instanceof Tensor) {
+  if (x instanceof getGlobalTensorClass()) {
     assertDtype(parseAsDtype, x.dtype, argName, functionName);
     return x;
   }