fix(Trivy): restore default Git strategy to allow .trivyignore

mentioned in commit 2c8cca2f

mentioned in merge request to-be-continuous/samples/golang-docker-on-aws!18 (merged)

mentioned in merge request to-be-continuous/samples/php-on-kubernetes!30 (merged)

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!41 (merged)

mentioned in merge request to-be-continuous/tools/vault-secrets-provider!24 (merged)

mentioned in merge request to-be-continuous/tools/tracking!14 (merged)

mentioned in commit 72366f7a

mentioned in merge request to-be-continuous/samples/maven-on-kubernetes!44 (merged)

mentioned in merge request to-be-continuous/tools/tracking!15 (merged)

mentioned in merge request to-be-continuous/tools/vault-secrets-provider!28 (merged)