fix: hide storage field for Redis managed databases (ElastiCache)

[Guimove]

AWS ElastiCache does not support configurable storage size - the capacity is determined by the node type (e.g., cache.t3.micro, cache.m6g.large). However, the UI was displaying a storage field for Redis managed databases, misleading users into thinking they could configure this value.

Changes:

• Hide storage input field for Redis managed databases (rendered as hidden input to preserve form state)
• Disable storage validation rules for Redis managed
• Prevent "Apply Immediately" storage warning from appearing for Redis managed
• Storage field remains visible and editable for other database types (PostgreSQL, MySQL, MongoDB)
• Storage field remains visible for Redis in container mode

This fix applies to both database creation and settings update flows.

Summary

Issue:

Screenshots / Recordings

Testing

• Changes tested locally in the relevant Console's pages and Storybooks
• yarn test or yarn test -u (if you need to regenerate snapshots)
• yarn format
• yarn lint

PR Checklist

• I followed naming, styling, and TypeScript rules (see .cursor/rules)
• I performed a self-review (diff inspected, dead code removed)
• I titled the PR using Conventional Commits with a scope when possible (e.g. feat(service): add new Terraform service) - required for semantic-release
• I only kept necessary comments, written in English (watch for useless AI comments)
• I involved a designer to validate UI changes if I am not a designer
• I covered new business logic with tests (unit)
• I confirmed CI is green (Codecov red can be accepted)
• I reviewed and executed locally any AI-assisted code

[RemiBonnet]

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