test: add missing httpMock.reset (#8836)

lib/datasource/bitbucket-tags/index.spec.ts

lib/datasource/github-tags/index.spec.ts

lib/datasource/gitlab-tags/index.spec.ts

lib/platform/bitbucket-server/index.spec.ts

lib/platform/bitbucket/comments.spec.ts

lib/platform/bitbucket/index.spec.ts

lib/platform/bitbucket/utils.spec.ts

lib/platform/gitea/gitea-helper.spec.ts

lib/platform/gitlab/index.spec.ts

lib/util/http/bitbucket-server.spec.ts

lib/util/http/bitbucket.spec.ts

lib/util/http/gitea.spec.ts

lib/util/http/host-rules.spec.ts