Update github.com/Microsoft/hcsshim to v0.8.10

Brings in a variety of changes, mostly to the containerd shim.

There is also a change to the Windows layer unpack code which fixes #4301.

Release link: https://github.com/microsoft/hcsshim/releases/tag/v0.8.10

Signed-off-by: Kevin Parsons <kevpar@microsoft.com>

vendor/github.com/Microsoft/hcsshim/internal/schema2/modification_request.go

@@ -0,0 +1,15 @@
+/*
+ * HCS API
+ *
+ * No description provided (generated by Swagger Codegen https://github.com/swagger-api/swagger-codegen)
+ *
+ * API version: 2.4
+ * Generated by: Swagger Codegen (https://github.com/swagger-api/swagger-codegen.git)
+ */
+
+package hcsschema
+
+type ModificationRequest struct {
+	PropertyType PropertyType `json:"PropertyType,omitempty"`
+	Settings     interface{}  `json:"Settings,omitempty"`
+}