Move to SAST_EXCLUDED_ANALYZERS
As part of gitlab-org/gitlab#290777 (closed), move away from SAST_DEFAULT_ANALYZERS and utilize SAST_EXCLUDED_ANALYZERS.
Also changed job name from qa-gosec-sast to qa-spotbugs-sast.
As part of gitlab-org/gitlab#290777 (closed), move away from SAST_DEFAULT_ANALYZERS and utilize SAST_EXCLUDED_ANALYZERS.
Also changed job name from qa-gosec-sast to qa-spotbugs-sast.