Adding missed MIT license in a few files (#12368)

## Summary of the Pull Request
Adding missed MIT license in a few files.

## PR Checklist
* [X] Closes #12062
* [X] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA

dep/Console/conapi.h

@@ -1,5 +1,6 @@
 /*++
-Copyright (c) Microsoft Corporation
+Copyright (c) Microsoft Corporation.
+Licensed under the MIT license.
 
 Module Name:
 - conapi.h

dep/Console/condrv.h

@@ -1,6 +1,7 @@
 /*++
 
 Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the MIT license.
 
 Module Name:
 

dep/Console/conmsgl1.h

@@ -1,6 +1,7 @@
 /*++
 
 Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the MIT license.
 
 Module Name:
 

dep/Console/conmsgl2.h

@@ -1,6 +1,7 @@
 /*++
 
 Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the MIT license.
 
 Module Name:
 

dep/Console/conmsgl3.h

@@ -1,6 +1,7 @@
 /*++
 
-Copyright (c) 1985 - 1999, Microsoft Corporation
+Copyright (c) 1985 - 1999, Microsoft Corporation.
+Licensed under the MIT license.
 
 Module Name:
 

dep/Console/ntcon.h

@@ -1,5 +1,6 @@
 //
 //    Copyright (C) Microsoft.  All rights reserved.
+//    Licensed under the MIT license.
 //
 #ifndef _NTCON_
 #define _NTCON_

dep/Console/winconp.h

@@ -1,3 +1,7 @@
+/*++
+Copyright (c) Microsoft Corporation.
+Licensed under the MIT license.
+--*/
 
 #ifndef _WINCONP_
 #define _WINCONP_

dep/NT/ntioapi_x.h

@@ -1,3 +1,8 @@
+/*++
+Copyright (c) Microsoft Corporation.
+Licensed under the MIT license.
+--*/
+
 #pragma once
 
 #define FILE_SYNCHRONOUS_IO_NONALERT            0x00000020

dep/Win32K/winuserp.h

@@ -1,4 +1,7 @@
 /*
+ * Copyright (c) Microsoft Corporation.
+ * Licensed under the MIT license.
+ *
  * Reserved console space.
  *
  * This was moved from the console code so that we can localize it