chore: deprecate remaining items in api/call.rs

[lwshang]

Description

The DecoderConfig type in src/call.rs is removed since we have decoupled the decoder configuration from candid with Rust CDK by the decode_with macro option.

The ManualReply type is deprecated and developers can use PhantomData to wrap the update/query return type.
It is supported by this Candid PR dfinity/candid#591 which implemented CandidType for PhantomData.
So we need to have the Candid PR merged and released first. Then I'll update the candid dependency here.

is_recovering_from_trap was moved into futures.rs and re-exported in lib.rs.

How Has This Been Tested?

e2e-tests macros verified that PhantomData works well with manual_reply.
Other changes were mainly documentation and deprecation notes. No need to test.

Checklist:

• The title of this PR complies with Conventional Commits.
• I have edited the CHANGELOG accordingly.
• I have made corresponding changes to the documentation.