test: use built-in collection types for type hints (Python 3.9 / PEP 585)

Since Python 3.9, type hinting has become a little less awkward, as for
collection types one doesn't need to import the corresponding
capitalized types (`Dict`, `List`, `Set`, `Tuple`, ...) anymore, but can
use the built-in types directly. [1] [2]
This commit applies the replacement for all Python scripts (i.e. in the
contrib and test folders) for the basic types:
    - typing.Dict  -> dict
    - typing.List  -> list
    - typing.Set   -> set
    - typing.Tuple -> tuple

[1] https://docs.python.org/3.9/whatsnew/3.9.html#type-hinting-generics-in-standard-collections
[2] https://peps.python.org/pep-0585/#implementation for a list of type

contrib/devtools/circular-dependencies.py

@@ -5,7 +5,6 @@
 
 import sys
 import re
-from typing import Dict, List, Set
 
 MAPPING = {
     'core_read.cpp': 'core_io.cpp',
@@ -33,7 +32,7 @@ def module_name(path):
     return None
 
 files = dict()
-deps: Dict[str, Set[str]] = dict()
+deps: dict[str, set[str]] = dict()
 
 RE = re.compile("^#include <(.*)>")
 
@@ -65,7 +64,7 @@ while True:
     shortest_cycle = None
     for module in sorted(deps.keys()):
         # Build the transitive closure of dependencies of module
-        closure: Dict[str, List[str]] = dict()
+        closure: dict[str, list[str]] = dict()
         for dep in deps[module]:
             closure[dep] = []
         while True: