chore: intoduce GenericError enum variant in enum ConnectorError

[hrithikesh026]

Type of Change

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

Description

intoduced GenericError enum variant in enum ConnectorError
Main branch PR: #6143

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?

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]

Review changes with SemanticDiff.

Analyzed 9 of 10 files.

Overall, the semantic diff is 40% smaller than the GitHub diff.

	Filename	Status
✔️	crates/storage_impl/src/redis/pub_sub.rs	Analyzed
✔️	crates/router_env/tests/env.rs	0.75% smaller
✔️	crates/router/src/types/api.rs	41.62% smaller
❔	crates/router/src/services/connector_integration_interface.rs	Unsupported file format
✔️	crates/router/src/core/health_check.rs	Analyzed
✔️	crates/router/src/core/payments.rs	Analyzed
✔️	crates/router/src/core/errors/utils.rs	65.61% smaller
✔️	crates/router/src/connector/globalpay.rs	45.46% smaller
✔️	crates/hyperswitch_interfaces/src/errors.rs	Analyzed
✔️	crates/drainer/src/health_check.rs	Analyzed