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

test/functional/test_framework/test_framework.py

@@ -19,7 +19,6 @@ import sys
 import tempfile
 import time
 
-from typing import List
 from .address import create_deterministic_address_bcrt1_p2tr_op_true
 from .authproxy import JSONRPCException
 from . import coverage
@@ -96,7 +95,7 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         """Sets test framework defaults. Do not override this method. Instead, override the set_test_params() method"""
         self.chain: str = 'regtest'
         self.setup_clean_chain: bool = False
-        self.nodes: List[TestNode] = []
+        self.nodes: list[TestNode] = []
         self.extra_args = None
         self.network_thread = None
         self.rpc_timeout = 60  # Wait for up to 60 seconds for the RPC server to respond