## Description
- Allowing static split of cypress specs in CI runs.
- Optimised the spec allocation by considering the duration history for
each spec.
- Updated the affecting workflows to utilise the static split
#### Type of change
- Workflows
- Cypress-split pugin
## Testing
- Workflow run
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
- **New Features**
- Introduced a new environment variable to optimize test resource
allocation during CI/CD processes.
- Enhanced Cypress testing with dynamic and static test splitting
strategies.
- **Refactor**
- Refactored Cypress plugin configuration to support conditional test
splitting based on the environment variable.
- **Chores**
- Updated GitHub Actions workflows to include new environment variables
for test runs.
- **Documentation**
- Updated internal documentation to reflect changes in test setup and
execution strategies.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
