add immigration_information to magi medicaid section

[vkghub]

PR Checklist

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• The title follows our guidelines
• Tests for the changes have been added (for bugfixes/features), they use let helpers and before blocks
• For all UI changes, there is cucumber coverage
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PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature (requires Feature flag)
• Data fix or migration (inert code, no impact until run)
• Refactoring (no functional changes, no API changes)
• Build related changes
• CI related changes
• Dependency updates (e.g., add a new gem or update to a version)

What is the ticket # detailing the issue?

Ticket: https://app.clickup.com/t/868hyrwxp

A brief description of the changes

Current behavior: Immigration information is present for individual market

New behavior: Immigration information will be a base class, inherited by both individual market and magi medicaid applicants.

Additional Context

Include any additional context that may be relevant to the peer review process.

[saikumar9]

lgtm!

[saipraveen18]

lgtm 👍

[saikumar9]

lgtm!