Update Gitlab Shell version to 14.21.0

Igor Drozdovrequested to merge
id-bump-gitlab-shell-to-14-21-0 into master

What does this MR do and why?

Updates Gitlab Shell version to v14.21.0:

  • Use a separate HTTP Client for Geo requests

Related MR: Release 14.21.0 (gitlab-shell!744 - merged)

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