chore(client): improve git repo connection page

[Jayanth-Parthsarathy]

Close: #7878

PR Details

• This PR improves the Connect to a git repository screen as outlined in Improvements for the "Connect to a git repository" screen #7878.
• It adds extra gap between the toggle button and the git provider list.
• It changes the position of GitLab to be below BitBucket.

PR Checklist

• Tests for the changes have been added
• npm test doesn't throw any error

[Jayanth-Parthsarathy]

Hey there @mulygottlieb. Please have a look at this and do let me know if I need to change anything.

[yuval-hazaz]

Thanks @Jayanth-Parthsarathy !

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