Unexpected feature flags

[nxsaken]

Since updating to Rust 1.80.0, which checks cfgs at compile-time, I've been noticing warnings about unexpected feature flags all over the project:

• unexpected cfg condition value: ffi_import (feature flag is commented out, might be related to Enable ffi_import for iroha_data_model #3102)
• unexpected cfg condition name: crate_type (seems unsupported: Conditional compilation based on crate_type rust-lang/rust#20267)
• unexpected cfg condition value: metric-instrumentation (feature flag missing)

[0x009922]

There are also warnings about #![cfg(not(coverage))] in UI tests.