feat(igxHierarchicalGrid): Add api to navigate to a specific child grid.

[MayaKirova]

Closes #14912

Additional information (check all that apply):

• Bug fix
• New functionality
• Documentation
• Demos
• CI/CD

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them

[viktorkombov]

In AppBuilder, the implementation works correctly in the design surface, but only when the zoom level is set to 100%. If the zoom level is changed (e.g., below 100%), the scrolling behavior breaks, and navigation to the child grids no longer works as expected.

You can reproduce this issue in the dev demos by adding a transform: scale(0.5, 0.5) style to the .content class in the _app-layout.scss file. This might indicate that the scrolling logic does not properly handle transformations or scaled layouts.