[#114] pool: Fix linter errors

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

pool/parts_buffer_pool.go

@@ -24,7 +24,13 @@ func NewPartBufferPool(limit uint64, maxObjectSize uint64) *PartsBufferPool {
 		limit:         limit,
 		maxObjectSize: maxObjectSize,
 		available:     limit,
-		syncPool:      &sync.Pool{New: func() any { return make([]byte, maxObjectSize) }},
+		syncPool: &sync.Pool{New: func() any {
+			// We have to use pointer (even for slices), see https://staticcheck.dev/docs/checks/#SA6002
+			// It's based on interfaces implementation in 2016, so maybe something has changed since then.
+			// We can use no pointer for multi-kilobyte slices though https://github.com/golang/go/issues/16323#issuecomment-254401036
+			buff := make([]byte, maxObjectSize)
+			return &buff
+		}},
 	}
 }
 
@@ -43,7 +49,7 @@ func (p *PartsBufferPool) GetBuffer() (*PartBuffer, error) {
 	p.available -= p.maxObjectSize
 
 	return &PartBuffer{
-		Buffer: p.syncPool.Get().([]byte),
+		Buffer: *p.syncPool.Get().(*[]byte),
 		len:    p.maxObjectSize,
 	}, nil
 }
@@ -58,7 +64,7 @@ func (p *PartsBufferPool) FreeBuffer(buff *PartBuffer) error {
 	}
 
 	p.available += buff.len
-	p.syncPool.Put(buff.Buffer)
+	p.syncPool.Put(&buff.Buffer)
 
 	return nil
 }

pool/pool.go

@@ -2094,7 +2094,6 @@ func initSessionForDuration(ctx context.Context, dst *session.Object, c client,
 	if clientCut {
 		id = uuid.New()
 		key = frostfsecdsa.PublicKey(ownerKey.PublicKey)
-
 	} else {
 		res, err := c.sessionCreate(ctx, prm)
 		if err != nil {