Merge bitcoin/bitcoin#22633: refactor: Replace remaining binascii method calls

021daedfa1 refactor: replace remaining binascii method calls (Zero-1729)

Pull request description:

  This PR removes the remaining `binascii` method calls outside `test/functional` and `test_framework`, as pointed out here  https://github.com/bitcoin/bitcoin/pull/22619#pullrequestreview-722153458.

  Follow-up to #22593 and #22619
  Closes #22605

ACKs for top commit:
  josibake:
    re-ACK https://github.com/bitcoin/bitcoin/pull/22633/commits/021daedfa100defad553d69cd3d628aaa5bc7caf
  theStack:
    re-ACK 021daedfa1

Tree-SHA512: 2ae9fee8917112c91a5406f219ca70f24cd8902b903db5a61fc2de85ad640d669a772f5c05970be0fcee6ef1cdd32fae2ca5d1ec6dc9798b43352c8160ddde6f

test/functional/test_framework/messages.py

@@ -19,7 +19,6 @@ Classes use __slots__ to ensure extraneous attributes aren't accidentally added
 by tests, compromising their intended effect.
 """
 from base64 import b32decode, b32encode
-from codecs import encode
 import copy
 import hashlib
 from io import BytesIO
@@ -681,7 +680,7 @@ class CBlockHeader:
             r += struct.pack("<I", self.nBits)
             r += struct.pack("<I", self.nNonce)
             self.sha256 = uint256_from_str(hash256(r))
-            self.hash = encode(hash256(r)[::-1], 'hex_codec').decode('ascii')
+            self.hash = hash256(r)[::-1].hex()
 
     def rehash(self):
         self.sha256 = None