Change the default log level to Warning

[ennc0d3]

The noticed that default log level in catalog operator is the default logrus level, which is Info. This cause extensive log from the operatorhubio-catalog pod.

OLM version: v27.0.0

...
time="2024-09-12T09:36:14Z" level=info msg="started call" :authority="[localhost:50051]" content-type="[application/grpc]" grpc.component=server grpc.method=Check grpc.method_type=unary grpc.request.deadline="2024-09-12T09:36:15Z" grpc.service=grpc.health.v1.Health grpc.start_time="2024-09-12T09:36:14Z" grpc.time_ms=0.041 peer.address="127.0.0.1:48760" protocol=grpc user-agent="[grpc_health_probe grpc-go/1.63.2]"
time="2024-09-12T09:36:14Z" level=info msg="finished call" :authority="[localhost:50051]" content-type="[application/grpc]" grpc.code=OK grpc.component=server grpc.method=Check grpc.method_type=unary grpc.request.deadline="2024-09-12T09:36:15Z" grpc.service=grpc.health.v1.Health grpc.start_time="2024-09-12T09:36:14Z" grpc.time_ms=0.175 peer.address="127.0.0.1:48760" protocol=grpc user-agent="[grpc_health_probe grpc-go/1.63.2]"

The issue is also present the latest release.