Merge bitcoin/bitcoin#23866: test: use MiniWallet for rpc_scantxoutset.py

e844115deae8a11c591704a84e56ed45fa81409c test: use MiniWallet for rpc_scantxoutset.py (Sebastian Falbesoner)
983ca0456c0fd32dc6ce166cb1e9aeb925e81161 test: introduce `address_to_scriptpubkey` helper (Sebastian Falbesoner)
e704d4d26f62f83068dc7d4082ab9b57bc33d1fb test: introduce `getnewdestination` helper for generating various address types (Sebastian Falbesoner)

Pull request description:

  This PR enables one more of the non-wallet functional tests (rpc_scantxoutset.py) to be run even with the Bitcoin Core wallet disabled by using the MiniWallet instead, as proposed in #20078 and https://github.com/bitcoin/bitcoin/pull/23858#issue-1088320649 more recently.

  Reviewer's guide:
  * [commit 1/3] For replacing the getnewaddress/getaddressinfo RPC calls a helper `getnewdestination` is introduced which allows to create addresses with the common address format types ('legacy', 'p2sh-segwit' and 'bech32'), but also additionally returns the corresponding pubkey and output script.
  * [commit 2/3] In order to send to addresses with MiniWallet, a helper `address_to_scriptpubkey` is introduced. It only supports legacy addresses (Base58Check) so far, which is sufficient for the scantxoutset test.
  * [commit 3/3] With those helpers, the use of MiniWallet in the test is quite straight-forward. To avoid repeatedly specifying parameters like `from_node` to MiniWallet's `send_to` method, another test-internal helper `sendtodestination` is introduced which supports specifying the destination both as outputscript or as address.

ACKs for top commit:
  w0xlt:
    reACK [e844115](https://github.com/bitcoin/bitcoin/pull/23866/commits/e844115deae8a11c591704a84e56ed45fa81409c)

Tree-SHA512: e4823dc507019b2b8e479602963c5dddc4c78211e1d934218ee0f0e32c068ab7e44e9793307f549127946364f57d684c4ea1d70f25865ea70d30d4f3855836d0

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