As a user, I want to be able to get all issues modified until a specific date when using GraphQL requests that support the modifiedSince parameter

As a user, I want to be able to get all issues modified until a specific date when using GraphQL queries such as getTests and getTestExecutions.

Currently, several GraphQL queries include a "modifiedSince" parameter, which retrieves all issues modified from a specified date onward.

To enhance filtering capabilities, a new "modifiedUntil" parameter should be added, allowing retrieval of issues modified up to a given date.

Both parameters should be able to be used simultaneously, allowing for queries retrieving issues within an interval of time