[hexagon][testing] filesystem-friendly test IDs

- Change the formula used to compute pytest test-ID strings.
  The previous formula included '(' and ')' characters, which
  can cause the filename to require escaping / quoting on the
  Bash command line.

tests/python/contrib/test_hexagon/pytest_util.py

@@ -60,7 +60,7 @@ def get_single_param_chunk(param_val, param_desc: Optional[str]):
             need_prefix_separator = True
 
         elif type(param_val) == TensorContentConstant:
-            val_str = f"const({param_val.elem_value})"
+            val_str = f"const[{param_val.elem_value}]"
             need_prefix_separator = True
 
         elif type(param_val) == TensorContentDtypeMin:
@@ -76,7 +76,7 @@ def get_single_param_chunk(param_val, param_desc: Optional[str]):
             need_prefix_separator = True
 
         elif type(param_val) == TensorContentSequentialCOrder:
-            val_str = f"seqC(start:{param_val.start_value},inc:{param_val.increment})"
+            val_str = f"seqC[start:{param_val.start_value},inc:{param_val.increment}]"
             need_prefix_separator = True
 
         else: