Use new gofumpt (#21613)

Update tinylib. Should fix CI.

`gofumpt -w .&&go generate ./...`

internal/bucket/bandwidth/monitor_gen.go

@@ -1,7 +1,7 @@
-package bandwidth
-
 // Code generated by github.com/tinylib/msgp DO NOT EDIT.
 
+package bandwidth
+
 import (
 	"github.com/tinylib/msgp/msgp"
 )

internal/bucket/bandwidth/monitor_gen_test.go

@@ -1,7 +1,7 @@
-package bandwidth
-
 // Code generated by github.com/tinylib/msgp DO NOT EDIT.
 
+package bandwidth
+
 import (
 	"bytes"
 	"testing"

internal/bucket/bandwidth/reader.go

@@ -52,7 +52,7 @@ func (r *MonitoredReader) Read(buf []byte) (n int, err error) {
 	}
 	if r.lastErr != nil {
 		err = r.lastErr
-		return
+		return n, err
 	}
 	b := r.throttle.Burst()  // maximum available tokens
 	need := len(buf)         // number of bytes requested by caller
@@ -81,15 +81,15 @@ func (r *MonitoredReader) Read(buf []byte) (n int, err error) {
 	}
 	err = r.throttle.WaitN(r.ctx, tokens)
 	if err != nil {
-		return
+		return n, err
 	}
 	n, err = r.r.Read(buf[:need])
 	if err != nil {
 		r.lastErr = err
-		return
+		return n, err
 	}
 	r.m.updateMeasurement(r.opts.BucketOptions, uint64(tokens))
-	return
+	return n, err
 }
 
 // NewMonitoredReader returns reference to a monitored reader that throttles reads to configured bandwidth for the