refactor: Rename `validateUrl` to `isHttpUrl` (#28484)

lib/modules/datasource/metadata.ts

lib/modules/datasource/npm/npmrc.ts

lib/modules/datasource/terraform-module/index.ts

lib/modules/datasource/terraform-module/utils.ts

lib/modules/manager/npm/post-update/rules.ts

lib/util/git/auth.ts

lib/util/host-rules.ts

lib/util/http/gerrit.ts

lib/util/url.spec.ts

lib/util/url.ts

lib/workers/repository/update/pr/changelog/release-notes.ts