Add search function to searchbars in new Holdingpen

[karolina-siemieniuk-morawska]

Currently search function in we holdingpen is mocked, use new backoffice API to make real search requests.

[karolina-siemieniuk-morawska]

Waiting for #527

[drjova]

It's merged

[karolina-siemieniuk-morawska]

TECH NOTES:

1. In DashboardPageContainer.tsx and Breadcrumbs.tsx, modify <Search /> component's onPressEnter and onSearch functions to also dispatch searchQueryUpdate() with following query { page: 1, search: {value} }