[Feature] Add support for geth FlatCallTracer

[mattsse]

Component

rpc

Describe the feature you would like

ref https://github.com/ethereum/go-ethereum/blob/0dd173a727dd2d2409b8e401b22e85d20c25b71f/eth/tracers/native/call_flat.go#L62-L62

similar to

alloy/crates/rpc-types-trace/src/geth/mod.rs

Lines 244 to 248 in cbfe3d9

	/// The callTracer tracks all the call frames executed during a transaction, including depth 0.
	/// The result will be a nested list of call frames, resembling how EVM works. They form a tree
	/// with the top-level call at root and sub-calls as children of the higher levels.
	#[serde(rename = "callTracer")]
	CallTracer,

named flatCallTracer

config:

https://github.com/ethereum/go-ethereum/blob/0dd173a727dd2d2409b8e401b22e85d20c25b71f/eth/tracers/native/call_flat.go#L122-L125

Additional context

No response