Remove input for interconnect bandwidth (#4205) (#2698)

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/4205.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+compute: added update support for `google_compute_interconnect_attachment` `bandwidth` field
+```

google-beta/resource_compute_interconnect_attachment.go

@@ -96,7 +96,6 @@ PARTNER type this will Pre-Activate the interconnect attachment`,
 				Type:         schema.TypeString,
 				Computed:     true,
 				Optional:     true,
-				ForceNew:     true,
 				ValidateFunc: validation.StringInSlice([]string{"BPS_50M", "BPS_100M", "BPS_200M", "BPS_300M", "BPS_400M", "BPS_500M", "BPS_1G", "BPS_2G", "BPS_5G", "BPS_10G", "BPS_20G", "BPS_50G", ""}, false),
 				Description: `Provisioned bandwidth capacity for the interconnect attachment.
 For attachments of type DEDICATED, the user can set the bandwidth.
@@ -489,6 +488,12 @@ func resourceComputeInterconnectAttachmentUpdate(d *schema.ResourceData, meta in
 	} else if v, ok := d.GetOkExists("description"); !isEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, descriptionProp)) {
 		obj["description"] = descriptionProp
 	}
+	bandwidthProp, err := expandComputeInterconnectAttachmentBandwidth(d.Get("bandwidth"), d, config)
+	if err != nil {
+		return err
+	} else if v, ok := d.GetOkExists("bandwidth"); !isEmptyValue(reflect.ValueOf(v)) && (ok || !reflect.DeepEqual(v, bandwidthProp)) {
+		obj["bandwidth"] = bandwidthProp
+	}
 	regionProp, err := expandComputeInterconnectAttachmentRegion(d.Get("region"), d, config)
 	if err != nil {
 		return err