The `generate` RPC method:
- was introduced in 2010
- is now only used for testing
- reaches across multiple components (wallet, mining)

I propose we remove the wallet `generate` RPC method and update all tests to use the `generatetoaddress` RPC method. We can do this non-invasively in the test framework by adding a `generate` method to `TestNode` so that the individual tests do not need to be updated. We could also add a `generate` alias to the `generatetoaddress` RPC method.

Doing this removes a wallet->server dependency and simplifies the wallet->server interface (#10973).

I'm opening this issue before implementing in case anyone has objections.
{
    if (request.fHelp || request.params.size() != 3)
        throw std::runtime_error(
            "prioritisetransaction <txid> <dummy value> <fee delta>\n"
            "Accepts the transaction into mined blocks at a higher (or lower) priority\n"
            "\nArguments:\n"
            "1. \"txid\"       (string, required) The transaction id.\n"
            "2. dummy          (numeric, optional) API-Compatibility for previous API. Must be zero or null.\n"
            "                  DEPRECATED. For forward compatibility use named arguments and omit this parameter.\n"
            "3. fee_delta      (numeric, required) The fee value (in satoshis) to add (or subtract, if negative).\n"
            "                  Note, that this value is not a fee rate. It is a value to modify absolute fee of the TX.\n"
            "                  The fee is not actually paid, only the algorithm for selecting transactions into a block\n"
            "                  considers the transaction as it would have paid a higher (or lower) fee.\n"
            "\nResult:\n"
            "true              (boolean) Returns true\n"
            "\nExamples:\n"
            + HelpExampleCli("prioritisetransaction", "\"txid\" 0.0 10000")
            + HelpExampleRpc("prioritisetransaction", "\"txid\", 0.0, 10000")
        );
    LOCK(cs_main);
    uint256 hash(ParseHashV(request.params[0], "txid"));
    CAmount nAmount = request.params[2].get_int64();
    if (!(request.params[1].isNull() || request.params[1].get_real() == 0)) {
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Priority is no longer supported, dummy argument to prioritisetransaction must be 0.");
    }
    mempool.PrioritiseTransaction(hash, nAmount);
    return true;
}
static UniValue BIP22ValidationResult(const CValidationState& state)