test: add setfeerate functional coverage in wallet_bumpfee.py
test: add setfeerate functional coverage in wallet_bumpfee.py

Github-Pull: #20391
Rebased-From: c907f158a6bf3cad782d4441e02abcbda210265b

bitcoinknots/bitcoin,bitcoinknots/bitcoin,bitcoinknots/bitcoin,bitcoinknots/bitcoin,bitcoinknots/bitcoin