Restore GitLabDSL.api to be GitLabAPI instance

Revert "Ensures that the Gitlab API is exposed properly through the dts"

This reverts commit e8d2052.

The breakage is between 10.6.5 and 10.6.6 version

Author: glensc

Diff for: source/dsl/GitLabDSL.ts

@@ -1,6 +1,6 @@
 // Please don't have includes in here that aren't inside the DSL folder, or the d.ts/flow defs break
 // TODO: extract out from BitBucket specifically, or create our own type
-import { Gitlab } from "@gitbeaker/node"
+import GitLabAPI from "../platforms/gitlab/GitLabAPI"
 import { RepoMetaData } from "./BitBucketServerDSL"
 
 // getPlatformReviewDSLRepresentation
@@ -21,7 +21,7 @@ export interface GitLabDSL extends GitLabJSONDSL {
   utils: {
     fileContents(path: string, repoSlug?: string, ref?: string): Promise<string>
   }
-  api: InstanceType<typeof Gitlab>
+  api: GitLabAPI
 }
 
 // ---

Diff for: source/platforms/GitLab.ts

@@ -228,5 +228,5 @@ export const gitlabJSONToGitLabDSL = (gl: GitLabDSL, api: GitLabAPI): GitLabDSL
   utils: {
     fileContents: api.getFileContents,
   },
-  api: api.apiInstance,
+  api,
 })

Diff for: source/platforms/gitlab/GitLabAPI.ts

@@ -77,10 +77,6 @@ class GitLabAPI {
     return `${this.projectURL}/merge_requests/${this.prId}`
   }
 
-  get apiInstance() {
-    return this.api
-  }
-
   getUser = async (): Promise<GitLabUserProfile> => {
     this.d("getUser")
     const user = (await this.api.Users.current()) as GitLabUserProfile