scripted-diff: replace remaining Python test equality asserts

Some Python functional tests still use plain `assert x == y`.
The earlier commits convert the ambiguous assert patterns by hand, so this commit can rewrite the remaining safe cases mechanically.
The verify script excludes `wallet_bumpfee.py`, `test_framework/netutil.py`, and `test_framework/authproxy.py`, which still contain assert forms that the plain line-based substitution would misidentify.

-BEGIN VERIFY SCRIPT-
perl -pi -e 's/^(\s*)assert (.+?) == ([^,#]+?)$/\1assert_equal(\2, \3)/' $(git ls-files -- 'test/functional' \
':(exclude)test/functional/wallet_bumpfee.py' ':(exclude)test/functional/test_framework/netutil.py' ':(exclude)test/functional/test_framework/authproxy.py')
-END VERIFY SCRIPT-

test/functional/test_framework/psbt.py

@@ -111,7 +111,7 @@ class PSBT:
         self.tx = None
 
     def deserialize(self, f):
-        assert f.read(5) == b"psbt\xff"
+        assert_equal(f.read(5), b"psbt\xff")
         self.g = from_binary(PSBTMap, f)
         assert PSBT_GLOBAL_UNSIGNED_TX in self.g.map
         self.tx = from_binary(CTransaction, self.g.map[PSBT_GLOBAL_UNSIGNED_TX])
@@ -125,8 +125,8 @@ class PSBT:
         assert isinstance(self.o, list) and all(isinstance(x, PSBTMap) for x in self.o)
         assert PSBT_GLOBAL_UNSIGNED_TX in self.g.map
         tx = from_binary(CTransaction, self.g.map[PSBT_GLOBAL_UNSIGNED_TX])
-        assert len(tx.vin) == len(self.i)
-        assert len(tx.vout) == len(self.o)
+        assert_equal(len(tx.vin), len(self.i))
+        assert_equal(len(tx.vout), len(self.o))
 
         psbt = [x.serialize() for x in [self.g] + self.i + self.o]
         return b"psbt\xff" + b"".join(psbt)