Migrate from dep to go module

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/go.etcd.io/etcd/mvcc/mvccpb/kv.proto

@@ -0,0 +1,49 @@
+syntax = "proto3";
+package mvccpb;
+
+import "gogoproto/gogo.proto";
+
+option (gogoproto.marshaler_all) = true;
+option (gogoproto.sizer_all) = true;
+option (gogoproto.unmarshaler_all) = true;
+option (gogoproto.goproto_getters_all) = false;
+option (gogoproto.goproto_enum_prefix_all) = false;
+
+message KeyValue {
+  // key is the key in bytes. An empty key is not allowed.
+  bytes key = 1;
+  // create_revision is the revision of last creation on this key.
+  int64 create_revision = 2;
+  // mod_revision is the revision of last modification on this key.
+  int64 mod_revision = 3;
+  // version is the version of the key. A deletion resets
+  // the version to zero and any modification of the key
+  // increases its version.
+  int64 version = 4;
+  // value is the value held by the key, in bytes.
+  bytes value = 5;
+  // lease is the ID of the lease that attached to key.
+  // When the attached lease expires, the key will be deleted.
+  // If lease is 0, then no lease is attached to the key.
+  int64 lease = 6;
+}
+
+message Event {
+  enum EventType {
+    PUT = 0;
+    DELETE = 1;
+  }
+  // type is the kind of event. If type is a PUT, it indicates
+  // new data has been stored to the key. If type is a DELETE,
+  // it indicates the key was deleted.
+  EventType type = 1;
+  // kv holds the KeyValue for the event.
+  // A PUT event contains current kv pair.
+  // A PUT event with kv.Version=1 indicates the creation of a key.
+  // A DELETE/EXPIRE event contains the deleted key with
+  // its modification revision set to the revision of deletion.
+  KeyValue kv = 2;
+
+  // prev_kv holds the key-value pair before the event happens.
+  KeyValue prev_kv = 3;
+}