refactor: resolve various warnings during build or by clippy

[PastaPastaPasta]

Issue being fixed or feature implemented

Resolve build warnings

What was done?

Resolve build warnings

cargo check --tests now returns only 1 warning; which according to @QuantumExplorer should be resolved in future?

> $ cargo check --tests                                                                                                                                                                                                       [±wip/refac/clippy ●]
warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
package:   /Users/pasta/workspace/platform/packages/wasm-dpp/Cargo.toml
workspace: /Users/pasta/workspace/platform/Cargo.toml
warning: /Users/pasta/workspace/platform/packages/rs-drive-proof-verifier/Cargo.toml: unused manifest key: package.crate-type
warning: skipping duplicate package `embedded` found at `/Users/pasta/.cargo/git/checkouts/rust-dashcore-b01a88e2cb0da4a0/25053c8/dash/embedded`
warning: use of deprecated method `tenderdash_abci::signatures::Signable::sign_digest`: replaced by calculate_sign_hash() to unify naming between core, platform and tenderdash
  --> packages/rs-drive-proof-verifier/src/verify.rs:78:10
   |
78 |         .sign_digest(
   |          ^^^^^^^^^^^
   |
   = note: `#[warn(deprecated)]` on by default

warning: `drive-proof-verifier` (lib) generated 1 warning
warning: `drive-proof-verifier` (lib test) generated 1 warning (1 duplicate)
    Finished dev [unoptimized + debuginfo] target(s) in 0.76s

How Has This Been Tested?

cargo t in root

Breaking Changes

None

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone