refactor(iota-types/iota-system-state): Remove multiple versions from the iota-system-state types

[jkrvivian]

Description of change

This PR will be merged to the feature branch core-node/feat/remove-multiple-types.

• Remove IotaSystemStateInnerV1, rename IotaSystemStateInnverV2 to IotaSystemStateV1
• Align type names to Move codes
  Note: IotaSystemStateWrapper still exists and corresponds to IotaSystemState in Move. It's a thin wrapper for accessing the inner object and is rarely used in Rust. It's used only in genesis snapshots and testing, and in most cases, we use the enum IotaSystemState instead.
• Add an enum PoolTokenExchangeRate to wraps different versions of PoolTokenExchangeRate

Changes to move codes:
This is supposed to be done in #3048 , but we forgot it.

• Rename ValidatorWrapper in Move to Validator

Links to any relevant issues

Close #3154

Type of change

Choose a type of change, and delete any options that are not relevant.

• Enhancement (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How the change has been tested

cargo test:

• /crates/iota-types
• /crates/iota-indexer
• /crates/iota-json-rpc
• /crates/iota-graphql-rpc
• /crates/iota-genesis-bulder
• /crates/iota-execution

Change checklist

Tick the boxes that are relevant to your changes, and delete any items that are not.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have added tests that prove my fix is effective or that my feature works
• I have checked that new and existing unit tests pass locally with my changes

[muXxer]

Please don't forget run cargo +nightly fmt and cargo clippy --fix.

[miker83z]

I think this PR could cover renaming StakedIota and TimelockedStakedIota as well! I think these are the only one remaining from the list in #3048 description

[miker83z]

I suggest these changes because I found it difficult to find a nice way to treat traits for StakedIota, TimelockedStakedIota and PoolTokenExchangeRate -> #3603

Originally I was going with the approach of having is_staked_iota in the Trait and implementing this function for each version. However, given the amount of places that re-use that StakedIota type, I thought this use of the traits could have been problematic when it comes to fixing the remaining parts of the monorepo such as APIs and typescript side.
This approach is not something necessary, but my general idea is to make this process a bit smoother and faster to finalize.

Plus, the PR fixes the BCS conversions and makes the node run.

[github-actions]

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