[suggestion] Remove cargo fmt from the WASM Builder

[0x009922]

Description

I raised a discussion originally here: #3841 (comment)

I'm puzzled about the inclusion of cargo fmt in the build process. While it makes sense for wasm_builder to handle cargo check and cargo build due to specific rustc parameters, cargo fmt doesn't seem to need such configuration. So why is it part of the build? Is formatting not the developer's responsibility? Are there historical reasons for this design choice?

@ilchu suggested that @Arjentix might help with clarifying it.

Proposed solution

Remove cargo fmt from iroha_wasm_builder crate.