build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/github.com/modern-go/reflect2/unsafe_iface.go

@@ -0,0 +1,64 @@
+package reflect2
+
+import (
+	"reflect"
+	"unsafe"
+)
+
+type iface struct {
+	itab *itab
+	data unsafe.Pointer
+}
+
+type itab struct {
+	ignore unsafe.Pointer
+	rtype  unsafe.Pointer
+}
+
+func IFaceToEFace(ptr unsafe.Pointer) interface{} {
+	iface := (*iface)(ptr)
+	if iface.itab == nil {
+		return nil
+	}
+	return packEFace(iface.itab.rtype, iface.data)
+}
+
+type UnsafeIFaceType struct {
+	unsafeType
+}
+
+func newUnsafeIFaceType(cfg *frozenConfig, type1 reflect.Type) *UnsafeIFaceType {
+	return &UnsafeIFaceType{
+		unsafeType: *newUnsafeType(cfg, type1),
+	}
+}
+
+func (type2 *UnsafeIFaceType) Indirect(obj interface{}) interface{} {
+	objEFace := unpackEFace(obj)
+	assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIndirect(objEFace.data)
+}
+
+func (type2 *UnsafeIFaceType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
+	return IFaceToEFace(ptr)
+}
+
+func (type2 *UnsafeIFaceType) IsNil(obj interface{}) bool {
+	if obj == nil {
+		return true
+	}
+	objEFace := unpackEFace(obj)
+	assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
+	return type2.UnsafeIsNil(objEFace.data)
+}
+
+func (type2 *UnsafeIFaceType) UnsafeIsNil(ptr unsafe.Pointer) bool {
+	if ptr == nil {
+		return true
+	}
+	iface := (*iface)(ptr)
+	if iface.itab == nil {
+		return true
+	}
+	return false
+}