Added gp_resqueue_config and gp_resgroup_role views into gp_toolkit.

[fairyfar]

Added two views into the resource manager tool gp_toolkit to perform the functions that are used frequently:

1. gp_toolkit.gp_resqueue_config: resource queue configuration.
2. gp_toolkit.gp_resgroup_role: assigned resource group to roles.

• [ ] Add tests for the change
• [ ] Document changes
• [ ] Communicate in the mailing list if needed
• [x] Pass make installcheck
• [ ] Review a PR in return to support the community