Temporarily add SAST_EXCLUDED_ANALYZERS back
Add SAST_EXCLUDED_ANALYZERS to fix failing downstream pipeline: https://gitlab.com/gitlab-org/security-products/analyzers/gemnasium/-/pipelines/320487925
As part of gitlab-org/gitlab#290777 (closed), we are tryning to move away from SAST_DEFAULT_ANALYZERS and utilize SAST_EXCLUDED_ANALYZERS.