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.
{
public:
    CWallet * const pwallet;
    void ProcessSubScript(const CScript& subscript, UniValue& obj, bool include_addresses = false) const
    {
        
        std::vector<std::vector<unsigned char>> solutions_data;
        txnouttype which_type = Solver(subscript, solutions_data);
        obj.pushKV("script", GetTxnOutputType(which_type));
        obj.pushKV("hex", HexStr(subscript.begin(), subscript.end()));
        CTxDestination embedded;
        UniValue a(UniValue::VARR);
        if (ExtractDestination(subscript, embedded)) {