[IT-3266] Close ports on bastian hosts (#22)

The bastian security group allow SSH access.  We can now
close that access by setting up self hosted runners
in GH actions.  This will make the hosts more secure.

depends on Sage-Bionetworks/agora-data-manager#116

templates/bastian.yaml

@@ -58,8 +58,6 @@ Resources:
       SubnetId: !ImportValue
         'Fn::Sub': '${AWS::Region}-${VpcName}-${VpcSubnet}'
       SecurityGroupIds:
-        - !ImportValue
-          'Fn::Sub': '${AWS::Region}-${VpcName}-BastianSecurityGroup'
         - !ImportValue
           'Fn::Sub': '${AWS::Region}-agora-docdb-${Environment}-DocumentDbAccessSecurityGroup'
       Tags: