Merged PR 37082: Add parameter to disable net isolation

Add parameter to disable net isolation, to allow downloading the tool for making appx packages.

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#### AI description  (iteration 1)
#### PR Classification
The pull request introduces a new pipeline configuration parameter to control network isolation.

#### PR Summary
This change adds a boolean parameter in the pipeline YAML file to disable network isolation during builds.
- `/.pipelines/Package-Official.yml`: Added a new `disableNetworkIsolation` parameter with a default value of false, mapped it to a variable, and passed it into the extended configuration settings.
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Author: daxian-dbw

.pipelines/Package-Official.yml

@@ -5,6 +5,9 @@ parameters: # parameters are shown up in ADO UI in a build queue time
     displayName: 'Enable debug output'
     type: boolean
     default: false
+  - name: disableNetworkIsolation
+    type: boolean
+    default: false
 
 variables:
   - name: CDP_DEFINITION_BUILD_COUNT
@@ -25,6 +28,8 @@ variables:
     value: $[format('{0:yyyyMMdd}-{1}', pipeline.startTime,variables['Build.SourceBranch'])]
   - name: branchCounter
     value: $[counter(variables['branchCounterKey'], 1)]
+  - name: disableNetworkIsolation
+    value: ${{ parameters.disableNetworkIsolation }}
 
 resources:
   pipelines:
@@ -53,6 +58,7 @@ extends:
       WindowsHostVersion:
         Version: 2022
         Network: KS3
+      disableNetworkIsolation: ${{ variables.disableNetworkIsolation }}
     globalSdl:
       disableLegacyManifest: true
       # disabled Armorty as we dont have any ARM templates to scan. It fails on some sample ARM templates.