[#1606] Use slices.Clone()/bytes.Clone() where possible

gopatch:
```
@@
var from, to expression
@@
+import "bytes"
-to := make([]byte, len(from))
-copy(to, from)
+to := bytes.Clone(from)

@@
var from, to expression
@@
+import "bytes"
-to = make([]byte, len(from))
-copy(to, from)
+to = bytes.Clone(from)

@@
var from, to, typ expression
@@
+import "slices"
-to := make([]typ, len(from))
-copy(to, from)
+to := slices.Clone(from)

@@
var from, to, typ expression
@@
+import "slices"
-to = make([]typ, len(from))
-copy(to, from)
+to = slices.Clone(from)
```

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/morph/client/multi.go

@@ -2,6 +2,7 @@ package client
 
 import (
 	"context"
+	"slices"
 	"sort"
 	"time"
 
@@ -99,8 +100,7 @@ mainLoop:
 		case <-t.C:
 			c.switchLock.RLock()
 
-			endpointsCopy := make([]Endpoint, len(c.endpoints.list))
-			copy(endpointsCopy, c.endpoints.list)
+			endpointsCopy := slices.Clone(c.endpoints.list)
 			currPriority := c.endpoints.list[c.endpoints.curr].Priority
 			highestPriority := c.endpoints.list[0].Priority