Remove linalg.matrix_rank from skiplist (#7497) (#8096)

Co-authored-by: Simon Teo <[email protected]>

Author: simonteozw

experimental/torch_xla2/test/test_ops.py

@@ -54,7 +54,6 @@
     "linalg.lu_solve",
     "linalg.matrix_norm",
     "linalg.matrix_power",
-    "linalg.matrix_rank",
     "linalg.solve_ex",
     "linalg.solve_triangular",
     "linalg.svd",