Fix Edit button vertical alignment in Identity Overrides row

[talissoncosta]

Problem

In the Edit Feature modal → Identity Overrides tab, the Edit button is vertically misaligned with the other row elements (toggle, identity name, value chip).

Location: web/components/modals/create-feature/index.js lines 1447–1527

Fix

Add align-items-center to the outer row container.

Acceptance Criteria

• Edit button and delete icon are vertically centred with the toggle and identity name

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Part of the Design System Audit (#6606) · Epic: #6882