Provide pagination data in the Sentry's response

What does this MR do?

Backend part related to #35122 (closed)

• Refactors Sentry client implementation to pass additional data with the response. That allows passing pagination-related information.
• Passes pagination data and accepts the cursor parameter to use Sentry's pagination functionality.

The change-log entry is not required because the changes are not visible to a user. There will be a frontend implementation followed by this MR.

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• ~~Label as security and @ mention @gitlab-com/gl-security/appsec~~
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team