Do not do StorageInfo() and ListBuckets() for FS/Erasure in health check handler (#7090)
Do not do StorageInfo() and ListBuckets() for FS/Erasure in health check handler (#7090)

Health checking programs very frequently use /minio/health/live 
to check health, hence we can avoid doing StorageInfo() and 
ListBuckets() for FS/Erasure backend.
NitishT/minio,aead/minio,krisis/minio,balamurugana/minio,minio/minio,fwessels/minio,NitishT/minio,harshavardhana/minio,vadmeste/minio,harshavardhana/minio,fwessels/minio,jimjag/minio,donatello/minio,balamurugana/minio,aead/minio,krishnasrinivas/minio,harshavardhana/minio,harshavardhana/minio,harshavardhana/minio,krishnasrinivas/minio,aead/minio,jimjag/minio,harshavardhana/minio,fwessels/minio,jimjag/minio,minio/minio,NitishT/minio,krishnasrinivas/minio,vadmeste/minio,krisis/minio,fwessels/minio,harshavardhana/minio,aead/minio,donatello/minio,aead/minio,aead/minio,aead/minio,krishnasrinivas/minio,aead/minio,NitishT/minio,jimjag/minio,harshavardhana/minio