Scheduler: workspace refactor — pass config object instead of workspace for groupedStrategy

[bit-byte0]

What:

Grouped strategies now receive a typed config object instead of the entire workspace.

How:

• New WorkspaceGroupedStrategyConfig interface with only needed callbacks
• initGroupedStrategy() builds the config from workspace methods
• All @ts-expect-error removed from both strategy files

[Copilot]

Pull request overview

This PR refactors Scheduler grouped strategies to accept a focused, typed WorkspaceGroupedStrategyConfig object instead of the full workspace instance, aiming to reduce coupling and remove @ts-expect-error usage in grouped strategy implementations.

Changes:

• Introduced WorkspaceGroupedStrategyConfig and updated both horizontal/vertical grouped strategy classes to use it.
• Updated SchedulerWorkSpace.initGroupedStrategy() to construct and pass the config object.
• Added Jest coverage validating strategy construction/behavior with the new config object.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/devextreme/js/__internal/scheduler/workspaces/work_space_grouped_strategy_vertical.ts	Switched vertical grouped strategy from workspace dependency to typed config callbacks.
packages/devextreme/js/__internal/scheduler/workspaces/work_space_grouped_strategy_horizontal.ts	Switched horizontal grouped strategy from workspace dependency to typed config callbacks.
packages/devextreme/js/__internal/scheduler/workspaces/types.ts	Added WorkspaceGroupedStrategyConfig interface defining the grouped strategy dependency surface.
packages/devextreme/js/__internal/scheduler/workspaces/m_work_space.ts	Builds and passes the config object when initializing grouped strategy.
packages/devextreme/js/__internal/scheduler/tests/grouped_strategy.test.ts	Added unit tests ensuring grouped strategies work with the config interface.