gh-99305: Speed up secrets.token_hex() ~2x (#99306)

simple code modernization.

Co-authored-by: Pieter Eendebak <pieter.eendebak@gmail.com>

Lib/secrets.py

@@ -13,7 +13,6 @@
 
 
 import base64
-import binascii
 
 from hmac import compare_digest
 from random import SystemRandom
@@ -56,7 +55,7 @@ def token_hex(nbytes=None):
     'f9bf78b9a18ce6d46a0cd2b0b86df9da'
 
     """
-    return binascii.hexlify(token_bytes(nbytes)).decode('ascii')
+    return token_bytes(nbytes).hex()
 
 def token_urlsafe(nbytes=None):
     """Return a random URL-safe text string, in Base64 encoding.

Misc/NEWS.d/next/Library/2022-11-10-11-51-39.gh-issue-99305.6LzQc3.rst

+Improve performance of :func:`secrets.token_hex`.