Bump major version number

What does this MR do?

Bump the major version number for 17.0 release.

What are the relevant issue numbers?

Bump SAST Analyzer major version for 17.0 and r... (gitlab-org/gitlab#455489 - closed) • Craig Smith • 17.0

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated for GitLab EE, if necessary
• Documentation created/updated for this project, if necessary
• Documentation reviewed by technical writer or follow-up review issue created
• Tests updated/added for this feature/bug
• Job definition updated, if necessary
  • Auto-DevOps template
  • Job definition example
  • CI Templates
• Conforms to the code review guidelines
• Conforms to the Go guidelines
• Security reports checked/validated by reviewer