gqltest: add search integration tests
Created by: unknwon
Adds integrations tests for search, which covers:
- repository group
- global text search:
- global filename search:
- global symbol search:
Please review by commit.
Part of #10068 (closed)
Created by: unknwon
Adds integrations tests for search, which covers:
Please review by commit.
Part of #10068 (closed)