refactor: remove rpc_client::ApiInfo

[aatifsyed]

Summary of changes

Changes introduced in this pull request:

• Add rpc::Client::default_or_from_env
• Use Url::password to pass in token information in rpc::Client
• Wherever ApiInfo was present, now use rpc::Client or Arc<rpc::Client>
• Delete crate::rpc_client
  • rpc_client::RpcRequest is now rpc::Request
• (minor) rename OneClientInner to UrlClientInner
• (minor) rename EndpointStatus to TestSummary
• (minor) convert static to const for permissions, more efficient permission checking code.
• remove following tests:
  • CHAIN_NOTIFY. Not actually tested
  • STATE_DECODE_PARAMS. Not actually tested, not actually implemented

Reference issue to close (if applicable)

Closes

Other information and links

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.
  • No user facing changes

[ruseinov]

nonblocking nit: I'm unsure if I like TestSummary naming, but I can't figure out a better one. This kinda mixes several different concepts together, like actual response errors, check errors and an actual valid status. Perhaps something like TestStatus would be more intelligible. In my head summary is something that could potentially have several properties, but here we always have only one outcome.

[ruseinov]

nice