Update to support latest analyzer and changes in ci-templates

Changes

• gemnasium analyzer version used in advisory-db-scan-time-sync-FREEZE needed to be bumped because this branch started to generate errors when the expectations of the analyzer integration test diverged: gitlab-org/security-products/analyzers/gemnasium!597 (merged) because of schema changes.
• go project scanning was updated in the analyzer to move away from the textual parsing of go.sum. This required the change to go.mod, go.sum, and main.go.
• The fake vuln had to be updated b/c it was no longer possible to insert a fake vulnerable module into go.sum.
• ci-templates was also updated to change the variable identifying the variable to be searched when evaluating a pipeline with multiple qa jobs: gitlab-org/security-products/ci-templates@a93ac7bc