[Engineering] Update onboarding interview recruiting

Problem

GitLab PMs are trying to recruit namespaces that are just starting to utilize GitLab in order to better understand the bottlenecks that new users run into when first getting started with GitLab. At the moment we are not recruiting enough users to gain that insight.

Details

As a result of the problems stated above we need to update some of the requirements in order to recruit more users and gain greater insights on the first mile of signup. see design here: #333977 (comment 672253640)

Requirements

1. Remove the team size limitation (we can start to recruit single user namespaces)
2. Update team (any namespace with more than 1 user) recruitment to include a $50 gift card incentive for completing their interview.
3. Update Calendly URL to https://calendly.com/d/n9wd-sy2b/gitlab-user-onboarding-research

Proposed Design

Changes:

• Addition of two illustrations
• Change in content to reflect new incentive being offered.

Design File

Implementation

• Add new illustrations to GitLab SVGs: gitlab-svgs!732 (merged)
• Update conditions of query params set in feedback URL (/-/survey_responses): !71809 (merged)
  • Remove group.member_count > 1 condition when setting show_invite_link
  • Set show_incentive when group.member_count > 1 (at least 2 members)
• Update the page: !71809 (merged)
  • Use new Calendly URL
  • Show chat illustration and copy if show_invite_link query param is true
  • Show incentive illustration and copy if show_incentive query param is true