[Azure Stack] Updates to Azs.Compute.Admin spec for autorest config (Azure#9032)

* Cumulative commit message:
commit 4ec980f (azure/stackadmin)
Author: Yuxing Zhou <[email protected]>
Date:   Wed Mar 18 15:14:57 2020 +0800

    [Azure Stack] Add scaleUnit and volumeLabel parameter to Disks_List (Azure#8733)

    * add scaleUnit and volumeLabel to Disks_List

    * fix ref location

    * update parameter description

commit c70efa6
Author: bganapa <[email protected]>
Date:   Tue Feb 25 19:33:53 2020 -0800

    Updating ReadMe to include (this-folder)

commit ac2ee55
Author: Yuxing Zhou <[email protected]>
Date:   Mon Feb 17 08:52:02 2020 +0800

    Add TargetScaleUnitParameter and TargetVolumeLabelParameter (Azure#8409)

commit 79944a3
Author: hannah-murphy-0 <[email protected]>
Date:   Thu Feb 13 17:25:47 2020 -0800

    Adding publisher field to VMExtension model (Azure#8398)
                                                                                                                        commit 8ef2c06                                                                         Merge: 4691c2a b53a498                                                                                              Author: bganapa <[email protected]>                            Date:   Tue Feb 4 22:11:56 2020 -0800                                        git merge upstream/master
    commit 9e551f0
Author: bganapa <[email protected]>
Date:   Tue Nov 12 11:44:22 2019 -0800

    Reset to Stackadmin2 (Azure#7766)

* Add autorest config to readme.md

* Fix path reference

Author: viananth

specification/azsadmin/resource-manager/compute/Microsoft.Compute.Admin/preview/2015-12-01-preview/VMExtensions.json

@@ -224,6 +224,10 @@
           "description": "Target virtual machine operating system type necessary for deploying the extension handler.",
           "$ref": "PlatformImages.json#/definitions/OsType"
         },
+        "publisher": {
+          "description": "The publisher of the VM Extension",
+          "type": "string"
+        },
         "computeRole": {
           "description": "Compute role",
           "type": "string"

specification/azsadmin/resource-manager/compute/readme.azsautogen.md

@@ -0,0 +1,13 @@
+# AutoRest v3 generators
+
+> see https://aka.ms/autorest
+
+``` yaml
+input-file:  
+    - Microsoft.Compute.Admin/preview/2015-12-01-preview/Compute.json
+    - Microsoft.Compute.Admin/preview/2015-12-01-preview/PlatformImages.json
+    - Microsoft.Compute.Admin/preview/2018-02-09/Quotas.json
+    - Microsoft.Compute.Admin/preview/2015-12-01-preview/VMExtensions.json
+    - Microsoft.Compute.Admin/preview/2018-07-30-preview/Disks.json
+    - Microsoft.Compute.Admin/preview/2018-07-30-preview/DiskMigrationJobs.json
+```

specification/azsadmin/resource-manager/compute/readme.md

@@ -56,32 +56,16 @@ csharp:
   clear-output-folder: true
 ```
 
-## Multi-API/Profile support for AutoRest v3 generators 
+# AutoRest v3 generators
 
-AutoRest V3 generators require the use of `--tag=all-api-versions` to select api files.
-
-This block is updated by an automatic script. Edits may be lost!
-
-``` yaml $(tag) == 'all-api-versions' /* autogenerated */
-# include the azure profile definitions from the standard location
-require: $(this-folder)/../../../../profiles/readme.md
-
-# all the input files across all versions
-input-file:
-  - $(this-folder)/Microsoft.Compute.Admin/preview/2015-12-01-preview/Compute.json
-  - $(this-folder)/Microsoft.Compute.Admin/preview/2015-12-01-preview/PlatformImages.json
-  - $(this-folder)/Microsoft.Compute.Admin/preview/2018-02-09/Quotas.json
-  - $(this-folder)/Microsoft.Compute.Admin/preview/2015-12-01-preview/VMExtensions.json
-  - $(this-folder)/Microsoft.Compute.Admin/preview/2018-07-30-preview/Disks.json
-  - $(this-folder)/Microsoft.Compute.Admin/preview/2018-07-30-preview/DiskMigrationJobs.json
-
-```
-
-If there are files that should not be in the `all-api-versions` set, 
-uncomment the  `exclude-file` section below and add the file paths.
+> see https://aka.ms/autorest
 
-``` yaml $(tag) == 'all-api-versions'
-#exclude-file: 
-#  - $(this-folder)/Microsoft.Example/stable/2010-01-01/somefile.json
+``` yaml
+input-file:  
+    - Microsoft.Compute.Admin/preview/2015-12-01-preview/Compute.json
+    - Microsoft.Compute.Admin/preview/2015-12-01-preview/PlatformImages.json
+    - Microsoft.Compute.Admin/preview/2018-02-09/Quotas.json
+    - Microsoft.Compute.Admin/preview/2015-12-01-preview/VMExtensions.json
+    - Microsoft.Compute.Admin/preview/2018-07-30-preview/Disks.json
+    - Microsoft.Compute.Admin/preview/2018-07-30-preview/DiskMigrationJobs.json
 ```
-