fix staking approval e2e test

[open-junius]

Description

Fixed an e2e test caused by new staking storage alpha2.

Related Issue(s)

• Closes #[issue number]

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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[evgeny-s]

@juniuszhou , I think we had a plan to move e2e contract tests to the ts-tests folder. We need to sync with @ales-otf and @shamil-gadelshin on this.

[open-junius]

@juniuszhou , I think we had a plan to move e2e contract tests to the ts-tests folder. We need to sync with @ales-otf and @shamil-gadelshin on this.

Thanks! I know it. but this one could run for a while. so just quick fix to make CI pass.