Use DS_EXCLUDED_ANALYZERS in Dependency Scanning analyzer development templates

Summary

Switch Dependency Scanning ci-templates and analyzer configs to use DS_EXCLUDED_ANALYZERS rather than DS_DEFAULT_ANALYZERS.

Improvements

DS_DEFAULT_ANALYZERS has been deprecated.

Involved components

• https://gitlab.com/gitlab-org/security-products/ci-templates (gitlab-org/security-products/ci-templates!216 (diffs))
• Update retire.js (gitlab-org/security-products/analyzers/retire.js!78 (merged))
• Update bundler-audit (gitlab-org/security-products/analyzers/bundler-audit!77 (merged))
• Update gemnasium-python (gitlab-org/security-products/analyzers/gemnasium-python!107 (merged))
• Update gemnasium-maven (gitlab-org/security-products/analyzers/gemnasium-maven!116 (merged))
• Update gemnasium (gitlab-org/security-products/analyzers/gemnasium!190 (merged))