Update `Your work` -> `Snippets` empty state

Problem

The empty state on Your work -> Snippets is not Pajamas compliant. Also the message should match the one on the user profile.

Current	Proposal

Implementation guide

• Update /app/pviews/shared/empty_states/_snippets.html.haml to use GlEmptyState
• Update text
  • Code snippets -> Get started with snippets
  • Store, share and embed small pieces of code and text -> Store, share and embed bits of code and text
• Regenerate translation files with tooling/bin/gettext_extractor locale/gitlab.pot.