feat: add routing support for v2 sdk session flow

[hrithikesh026]

Type of Change

• Bugfix
• New feature
• Enhancement
• Refactoring
• Dependency updates
• Documentation
• CI/CD

Description

Added session routing support for session call in v2. And store the prerouting results in the payment_intent tabled prerouting_algorithm column.

Other changes:

• used MerchantConnectorAccounts Wrapper instead of Vec<MerchantConnectorAccount> across the codebase.

Additional Changes

• This PR modifies the API contract
• This PR modifies the database schema
• This PR modifies application configuration/environment variables

Motivation and Context

How did you test it?

follow the steps mentioned in this PR.
#6502

In addition to that check if prerouting_algorithm column in payment_intent is updated.
use this query.

select prerouting_algorithm from payment_intent where id ='payment_id';

Checklist

• I formatted the code cargo +nightly fmt --all
• I addressed lints thrown by cargo clippy
• I reviewed the submitted code
• I added unit tests for my changes where possible

[semanticdiff-com]

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Changed Files

File	Status
crates/router/src/core/utils.rs	68% smaller
crates/router/src/core/payments/operations/payment_session.rs	65% smaller
crates/router/src/core/payment_methods/cards.rs	64% smaller
crates/router/src/core/admin.rs	60% smaller
crates/router/src/core/payout_link.rs	51% smaller
crates/router/src/db/merchant_connector_account.rs	48% smaller
crates/common_utils/src/macros.rs	21% smaller
crates/router/src/core/payments/operations/payment_session_intent.rs	16% smaller
crates/router/src/core/payments/helpers.rs	15% smaller
crates/router/src/core/payments/routing.rs	9% smaller
crates/router/src/core/payments.rs	8% smaller
crates/hyperswitch_domain_models/src/merchant_connector_account.rs	3% smaller
.typos.toml	Unsupported file format
crates/diesel_models/src/payment_intent.rs	0% smaller
crates/hyperswitch_domain_models/src/payments/payment_intent.rs	0% smaller
crates/router/src/consts.rs	0% smaller
crates/router/src/core/payment_methods.rs	0% smaller
crates/router/src/core/payments/session_operation.rs	0% smaller
crates/router/src/core/routing.rs	0% smaller
crates/router/src/core/routing/helpers.rs	0% smaller
crates/router/src/db/kafka_store.rs	0% smaller
crates/router/src/services/connector_integration_interface.rs	Unsupported file format
crates/router/src/types/api.rs	0% smaller
crates/router/src/types/api/fraud_check.rs	0% smaller