Test: Provide a setting to define the snippet sort order

[Tyriar]

Test for #9072, #9122, #6320, #9286:

• Windows - @ramya-rao-a
• OS X - @Tyriar
• Linux - @chrmarti

We have a new setting editor.snippetSuggestions which allows to control how snippets work. Verify that:

• you can define how snippets are sorted (top, bottom, inline)
• you can define to not show snippets (none)
• you can intellisense et al when configuring the setting
• the config is live and doesn't require a restart

[Tyriar]

Is there documentation on this? Also could the jsdoc be expanded to include enough information to make an informed choice? It's not immediately clear what inline is exactly as well as middle (and why that would be useful).