deps: update buildkit, vendor changes

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>

vendor/github.com/docker/cli/opts/throttledevice.go

@@ -62,9 +62,8 @@ type ThrottledeviceOpt struct {
 
 // NewThrottledeviceOpt creates a new ThrottledeviceOpt
 func NewThrottledeviceOpt(validator ValidatorThrottleFctType) ThrottledeviceOpt {
-	values := []*blkiodev.ThrottleDevice{}
 	return ThrottledeviceOpt{
-		values:    values,
+		values:    []*blkiodev.ThrottleDevice{},
 		validator: validator,
 	}
 }
@@ -85,7 +84,7 @@ func (opt *ThrottledeviceOpt) Set(val string) error {
 
 // String returns ThrottledeviceOpt values as a string.
 func (opt *ThrottledeviceOpt) String() string {
-	var out []string
+	out := make([]string, 0, len(opt.values))
 	for _, v := range opt.values {
 		out = append(out, v.String())
 	}
@@ -95,7 +94,9 @@ func (opt *ThrottledeviceOpt) String() string {
 
 // GetList returns a slice of pointers to ThrottleDevices.
 func (opt *ThrottledeviceOpt) GetList() []*blkiodev.ThrottleDevice {
-	return append([]*blkiodev.ThrottleDevice{}, opt.values...)
+	out := make([]*blkiodev.ThrottleDevice, 0, len(opt.values))
+	copy(out, opt.values)
+	return out
 }
 
 // Type returns the option type