feat(rpc): Decouple v07 from v06 types and methods

[t00ts]

This PR is part of #2220

Summary

This PR removes the existing dependencies the current RPC versions (v07 and beyond) have on the legacy v06 RPC version, effectively decoupling the two.

Key changes include:

• Migration of types: All relevant types, methods and tests from v06 have been migrated to common modules, allowing for reusability on newer RPC versions.

• DTO Removal: A number of data transfer objects (DTOs) from the v06 version have been removed and replaced with the actual types they were wrapping. This simplifies the code by eliminating unnecessary abstraction. The SerializeForVersion is implemented in the Input and Output DTO types for every method.

• V06 Module Disabled: The v06 module is now fully disabled and will no longer be built as part of the project. This sets the stage for its future removal. The V06 variant from the multiple RpcVersion enums has been removed, as well as version-specific routing tests.

This PR helps streamline the codebase and ensures future versions of the RPC system are independent of the outdated v06 implementation.

Next steps

• V06 Module Deletion: The v06 module will be deleted in an upcoming PR to keep this one focused and avoid making it too large.

• Move SerializeForVersion into the super module so it can be implemented on common types #2181

• DTO cleanup, review of leftover serde derives and deserialize_serde calls

[sistemd]

LGTM, if the starknet.py/starknet.js tests pass it's probably good to go

[kkovaacs]

LGTM, thanks for your effort! Converting those characterization test fixtures was a real beast.