Handle ActivationLockBypassCode Request (#578)

* add ActivationLockBypassCode Request

* Update mdm.pb.go

fixed typo

* Update mdm.pb.go

add Size method

* Update unmarshal_proto.go

remove pbc

* add api script for activation_lock_bypass_code

* update Changelog

* Simplify Code

I was able to simplify the code as ActivationLockBypassCode does not have any additional fields.

* Update command.go

Remove ActivationLockBypassCode struct as ActivationLockBypassCode does not include any extra fields.

tools/api/commands/activation_lock_bypass_code

@@ -0,0 +1,10 @@
+#!/bin/bash
+source $MICROMDM_ENV_PATH
+endpoint="v1/commands"
+jq -n \
+  --arg request_type "ActivationLockBypassCode" \
+  --arg udid "$1" \
+  '.udid = $udid
+  |.request_type = $request_type
+  '|\
+  curl $CURL_OPTS -u "micromdm:$API_TOKEN" "$SERVER_URL/$endpoint" -d@-