feat(rpc-testing-utils) : implement debug_traceCall JSON-RPC method

[DoTheBestToGetTheBest]

this PR Introduced debug_trace_call_json in DebugApiExt. Now, tracing calls is simpler and more insightful! 🚀🔍

[mattsse]

the issue with this is that both sides, client/server are still symmetrical here.

what we want is a way to easily send request params as string

like request but with a str argument, so we can call it like `"debug_traceCall", "["0x...",...]"

[DoTheBestToGetTheBest]

ke request but with a str argument, so we can call it like `"debug_traceCall", "["0x...",...]

Ty lot for your review boss!

i think i got it, we don't need anymore to specify that we're using CallRequest for our params, going to try this, thanks