Improve git +ssh test (#17306)

* improve git test

tests/e2e/utils/VCS/github/GitHubUtil.ts

@@ -44,4 +44,48 @@ export class GitHubUtil {
     }
   }
 
+  async getPublicSshKeys(authToken: string): Promise<Array<string>> {
+    const gitHubApiSshURL: string = GitHubUtil.GITHUB_API_ENTRIPOINT_URL + 'user/keys';
+    const authHeader = { headers: { 'Authorization': 'token ' + authToken, 'Content-Type': 'application/json' } };
+    try {
+      const response = await axios.get(gitHubApiSshURL, authHeader);
+      const stringified = JSON.stringify(response.data);
+      const arrayOfWorkspaces = JSON.parse(stringified);
+      const idOfRunningWorkspace: Array<string> = new Array();
+      for (let entry of arrayOfWorkspaces) {
+        idOfRunningWorkspace.push(entry.id);
+      }
+      return idOfRunningWorkspace;
+    } catch (error) {
+      console.error('Cannot get public Keys from github: ' + gitHubApiSshURL);
+      console.error(error);
+      throw error;
+    }
+  }
+
+  async removePublicSshKey(authToken: string, keyId: string) {
+    const gitHubApiSshURL: string = GitHubUtil.GITHUB_API_ENTRIPOINT_URL + 'user/keys/' + keyId;
+    const authHeader = { headers: { 'Authorization': 'token ' + authToken, 'Content-Type': 'application/json' } };
+    try { await axios.delete(gitHubApiSshURL, authHeader); } catch (error) {
+      console.error('Cannot delete the public key from the GitHub account: ');
+      console.error(error);
+      throw error;
+    }
+  }
+
+
+  async removeAllPublicSshKeys(authToken: string) {
+    try {
+      const idList: string[] = await this.getPublicSshKeys(authToken);
+      for (let id of idList) {
+        this.removePublicSshKey(authToken, id);
+      }
+
+    } catch (error) {
+      console.error('Cannot delete the public key from the GitHub account: ');
+      console.error(error);
+      throw error;
+    }
+  }
+
 }