test: check for importprunedfunds RPC errors

[theStack]

This PR adds missing test coverage for the following errors of the importprunedfunds RPC:

bitcoin/src/wallet/rpc/backup.cpp

Lines 320 to 322 in 7003b6a

	if (!DecodeHexTx(tx, request.params[0].get_str())) {
	throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed. Make sure the tx has at least one input.");
	}

bitcoin/src/wallet/rpc/backup.cpp

Lines 332 to 334 in 7003b6a

	if (merkleBlock.txn.ExtractMatches(vMatch, vIndex) != merkleBlock.header.hashMerkleRoot) {
	throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Something wrong with merkleblock");
	}

bitcoin/src/wallet/rpc/backup.cpp

Lines 338 to 340 in 7003b6a

	if (!pwallet->chain().findAncestorByHash(pwallet->GetLastBlockHash(), merkleBlock.header.GetHash(), FoundBlock().height(height))) {
	throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found in chain");
	}

bitcoin/src/wallet/rpc/backup.cpp

Lines 343 to 345 in 7003b6a

	if ((it = std::find(vMatch.begin(), vMatch.end(), hashTx)) == vMatch.end()) {
	throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction given doesn't exist in proof");
	}

[DrahtBot]

The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

Conflicts

Reviewers, this pull request conflicts with the following ones:

• #20892 (tests: Run both descriptor and legacy tests within a single test invocation by achow101)

If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

[maflcko]

review ACK 7573789