Only send repository ids in databases param

At the moment we're only able to send one of:
- repositories
- repositoryLists
- repositoryOwners

In the future, we intend to be able to send a combination of these
but at the moment the API will only ever allow you to send one.

So let's be consistent and just send `repositories` here.

extensions/ql-vscode/src/vscode-tests/cli-integration/remote-queries/variant-analysis-processor.test.ts

@@ -34,8 +34,6 @@ describe('Variant Analysis processor', function() {
       },
       'databases': {
         'repositories': ['1', '2', '3'],
-        'repositoryLists': ['top10', 'top100'],
-        'repositoryOwners': ['mona', 'lisa']
       },
       'status': 'succeeded',
       'actionsWorkflowRunId': 456,

extensions/ql-vscode/src/vscode-tests/factories/remote-queries/shared/variant-analysis-submission.ts

@@ -13,8 +13,6 @@ export function createMockSubmission(): VariantAnalysisSubmission {
     },
     databases: {
       repositories: ['1', '2', '3'],
-      repositoryLists: ['top10', 'top100'],
-      repositoryOwners: ['mona', 'lisa'],
     }
   };
 }