feat(platform)!: state transition fee increase and priorities

[QuantumExplorer]

Issue being fixed or feature implemented

If the mempool was full users had no way to incentivize proposers to include their state transitions over other ones. With this PR we introduce a fee multiplier. This fee multiplier is only on processing costs. The greater the fee multiplier the more priority your transaction will receive in the mempool.

What was done?

Introduced a fee multiplier

How Has This Been Tested?

Added a test on check tx that showed the priority was higher with a fee multiplier, also shows this transaction cost more in processing fees

Breaking Changes

State transitions now have a fee multiplier u16 field.

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

[PastaPastaPasta]

Can you do cargo fmt in another PR? looks like a lot of it is unrelated to your first commit?

[QuantumExplorer]

@PastaPastaPasta all prs should have cargo fmt done, otherwise the linter should fail CI.

[shumkov]

👍