Merge #16465: test: Test p2sh-witness and bech32 in wallet_import_rescan

fa3c6575ca lint: Add false positive to python dead code linter (MarcoFalke)
fa25668e1c test: Test p2sh-witness and bech32 in wallet_import_rescan (MarcoFalke)
fa79af2989 test: Replace fragile "rng" with call to random() (MarcoFalke)
fac3dcf7d0 test: Generate one block for each send in wallet_import_rescan (MarcoFalke)

Pull request description:

  This adds test coverage for segwit in the `wallet_import_rescan` test, among other cleanups.

ACKs for top commit:
  jnewbery:
    ACK fa3c6575ca

Tree-SHA512: 877741763c62c1bf9d868864a1e3f0699857e8c028e9fcd65c7eeb73600c22cbe97b7b51093737743d9e87bcb991c1fe1086f673e18765aef0fcfe27951402f0

test/functional/test_framework/address.py

@@ -4,6 +4,8 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Encode and decode BASE58, P2PKH and P2SH addresses."""
 
+import enum
+
 from .script import hash256, hash160, sha256, CScript, OP_0
 from .util import hex_str_to_bytes
 
@@ -11,6 +13,13 @@ from . import segwit_addr
 
 ADDRESS_BCRT1_UNSPENDABLE = 'bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj'
 
+
+class AddressType(enum.Enum):
+    bech32 = 'bech32'
+    p2sh_segwit = 'p2sh-segwit'
+    legacy = 'legacy'  # P2PKH
+
+
 chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'