feat: Add option to pass in rpc client when using anchor_client

[cryptopapi997]

Resolves #3050

[vercel]

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[acheroncrypto]

Why not directly accept mocks (similar to new_mock_with_mocks), with a new feature called mock? I feel like this would be easier to discover and use.

[cryptopapi997]

I feel like the way it's currently is more general, which in this case is a good thing because it means if the solana mock doesn't support a specific kind of operation anyone can spin up their own adapted mock version and pass it in. The docs for new_mock_with_mocks method themselves also say this

It is primarily for internal use, with limited customizability, and behaviors determined by internal Solana test cases. New users should consider implementing RpcSender themselves and constructing RpcClient with RpcClient::new_sender to get mock behavior.

Happy to rename the feature to mock though if you think that's more clear.

[cryptopapi997]

wdyt @acheroncrypto ?

[acheroncrypto]

Happy to rename the feature to mock though if you think that's more clear.

Yeah, I think it's more clear.

Also, we might have to merge #3057 first as you mentioned in its description.

[cryptopapi997]

Addressed your comments and renamed it to mock. And yea, I agree best to merge this after #3057 just in case.

[cryptopapi997]

Now that #3057 is merged we can go back to this one, just merged master into here. Feel free to take a look when you get a chance @acheroncrypto

[acheroncrypto]

Great work, thanks!