logging: Add subsystem to log API (#19002)

Create new code paths for multiple subsystems in the code. This will
make maintaing this easier later.

Also introduce bugLogIf() for errors that should not happen in the first
place.

cmd/metacache-server-pool.go

@@ -29,7 +29,6 @@ import (
 	"time"
 
 	xioutil "github.com/minio/minio/internal/ioutil"
-	"github.com/minio/minio/internal/logger"
 )
 
 func renameAllBucketMetacache(epPath string) error {
@@ -136,7 +135,7 @@ func (z *erasureServerPools) listPath(ctx context.Context, o *listPathOptions) (
 			}
 			if !errors.Is(err, context.DeadlineExceeded) {
 				// Report error once per bucket, but continue listing.
-				logger.LogOnceIf(ctx, err, "GetMetacacheListing:"+o.Bucket)
+				storageLogOnceIf(ctx, err, "GetMetacacheListing:"+o.Bucket)
 			}
 			o.Transient = true
 			o.Create = false
@@ -322,7 +321,7 @@ func (z *erasureServerPools) listMerged(ctx context.Context, o listPathOptions,
 			allAtEOF = false
 			continue
 		}
-		logger.LogIf(ctx, err)
+		storageLogIf(ctx, err)
 		return err
 	}
 	if allAtEOF {