feat: add search box by click component

Martin Wortschackrequested to merge
175-update-search-components-in-gitlab-ui into master

Splits the GlSearchBox component into two separate components:

GlSearchBoxByType GlSearchBoxByClick
search_by_type search_by_click
The default search-box that triggers a search as the user types. An alternative to GlSearchBoxByType that has a slightly different UI and will trigger a search only when the user hits the enter key or clicks on the search button.

Tooltips

In addition, it adds a tooltip to the clear icon:

GlSearchBoxByType GlSearchBoxByClick
tooltip_search_by_type tooltip_search_by_click

Closes:

Edited by Martin Wortschack

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