feat(blocklist): introduce EligibilityPaymentMethodData for blocklist and eligibility checks

[ayush22667]

Description

Introduces EligibilityPaymentMethodData as a dedicated type for blocklist and eligibility checks, decoupling it from the broader PaymentMethodData type.

Changes Required

• Add EligibilityCard and EligibilityPaymentMethodData types where only card_number is required (no CVV), replacing the full PaymentMethodData in eligibility and blocklist check flows
• Implement conversions from CardWithOptionalCVC and CardWithNetworkTokenDetails into EligibilityCard
• Fix enum serialization strings for GoldPlatinum, GoldPrem, and GeneralPurposeReLoadableCard card subtypes

Related PR

Tracked in #11696 (hotfix for hotfix-2026.04.01.0)
Original implementation: #11654