Merge #14468: [wallet] Deprecate generate RPC method

ab9aca2bdf [rpc] add 'getnewaddress' hint to 'generatetoaddress' help text. (John Newbery)
c9f02955b2 [wallet] Deprecate the generate RPC method (John Newbery)
aab81720de [tests] Add generate method to TestNode (John Newbery)
c269209336 [tests] Small fixups before deprecating generate (John Newbery)

Pull request description:

  Deprecates the `generate` RPC method.

  For concept discussion, see #14299.

  Fixes #14299.

Tree-SHA512: 16a3b8b742932e4f0476c06b23de07a34d9d215b41d9272c1c9d1e39966b0c2406f17c5ab3cc568947620c08171ebe5eb74fd7ed4b62151363e305ee2937cc80

test/functional/wallet_multiwallet.py

@@ -129,7 +129,7 @@ class MultiWalletTest(BitcoinTestFramework):
         self.start_node(0, ['-wallet=w4', '-wallet=w5'])
         assert_equal(set(node.listwallets()), {"w4", "w5"})
         w5 = wallet("w5")
-        w5.generate(1)
+        node.generatetoaddress(nblocks=1, address=w5.getnewaddress())
 
         # now if wallets/ exists again, but the rootdir is specified as the walletdir, w4 and w5 should still be loaded
         os.rename(wallet_dir2, wallet_dir())
@@ -153,7 +153,7 @@ class MultiWalletTest(BitcoinTestFramework):
         wallet_bad = wallet("bad")
 
         # check wallet names and balances
-        wallets[0].generate(1)
+        node.generatetoaddress(nblocks=1, address=wallets[0].getnewaddress())
         for wallet_name, wallet in zip(wallet_names, wallets):
             info = wallet.getwalletinfo()
             assert_equal(info['immature_balance'], 50 if wallet is wallets[0] else 0)
@@ -166,7 +166,7 @@ class MultiWalletTest(BitcoinTestFramework):
         assert_raises_rpc_error(-19, "Wallet file not specified", node.getwalletinfo)
 
         w1, w2, w3, w4, *_ = wallets
-        w1.generate(101)
+        node.generatetoaddress(nblocks=101, address=w1.getnewaddress())
         assert_equal(w1.getbalance(), 100)
         assert_equal(w2.getbalance(), 0)
         assert_equal(w3.getbalance(), 0)
@@ -175,7 +175,7 @@ class MultiWalletTest(BitcoinTestFramework):
         w1.sendtoaddress(w2.getnewaddress(), 1)
         w1.sendtoaddress(w3.getnewaddress(), 2)
         w1.sendtoaddress(w4.getnewaddress(), 3)
-        w1.generate(1)
+        node.generatetoaddress(nblocks=1, address=w1.getnewaddress())
         assert_equal(w2.getbalance(), 1)
         assert_equal(w3.getbalance(), 2)
         assert_equal(w4.getbalance(), 3)