add origin in extension

[open-junius]

Description

Add the origin in the Ink, use can choose the contract add as signed account or real origin as account

Related Issue(s)

• Closes Enable Caller Context Preservation in Chain Extension for Staking Operations #2549

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Other (please describe):

Breaking Change

If this PR introduces a breaking change, please provide a detailed description of the impact and the migration path for existing applications.

Checklist

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have run ./scripts/fix_rust.sh to ensure my code is formatted and linted correctly
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

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Additional Notes

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[camfairchild]

Waiting on response on the issue about using delegate_call instead

[shamil-gadelshin]

Can we use pallet-subtensor WeightInfo implementation for weights?

[shamil-gadelshin]

Can we use <T as crate::pallet::Config>::WeightInfo::remove_stake_limit instead?

[open-junius]

Yes, we should use weights from subtensor pallet.

[open-junius]

Waiting on response on the issue about using delegate_call instead

I did some research in try-delegate-call branch
https://github.com/opentensor/subtensor/blob/try-delegate-call/contract-tests/delegate-call/lib.rs#L68.

• user call -> contract -> runtime extension
  caller is user's account and address is contract's address
• user call -> delegate call contract -> direct call -> runtime extension
  caller is user's account and address is delegate call contract's address

In Ink, we must delegate call with the contract codehash like follows.
There is no codehash for runtime extension part, so we can't do

• user call -> delegate call contract -> runtime extension

let my_return_value = build_call::<CustomEnvironment>()
                .delegate(ink::primitives::Hash::from(code_hash))
                .exec_input(ExecutionInput::new(Selector::new(ink::selector_bytes!(
                    "dummy"
                ))))
                .returns::<Result<(), ReadWriteErrorCode>>()
                .invoke();