Update variable used to bypass the blocking check for multiple NuGet feeds (#19967)

* nuget multiple feed fixes

* Update tools/releaseBuild/azureDevOps/vpackRelease.yml

* Update linux.yml

* Update mac.yml

* Update windows.yml

* Update windows-packaging.yml

* fix whitespace issues

* more whitespace

* more whitespace

.vsts-ci/linux.yml

@@ -55,6 +55,7 @@ variables:
   # Avoid expensive initialization of dotnet cli, see: https://donovanbrown.com/post/Stop-wasting-time-during-NET-Core-builds
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
   __SuppressAnsiEscapeSequences: 1
+  nugetMultiFeedWarnLevel: none
 
 resources:
   repositories:

.vsts-ci/mac.yml

@@ -49,6 +49,7 @@ variables:
   # Turn off Homebrew analytics
   HOMEBREW_NO_ANALYTICS: 1
   __SuppressAnsiEscapeSequences: 1
+  nugetMultiFeedWarnLevel: none
 
 resources:
 - repo: self

.vsts-ci/windows.yml

@@ -46,6 +46,7 @@ variables:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
   __SuppressAnsiEscapeSequences: 1
   NugetSecurityAnalysisWarningLevel: none
+  nugetMultiFeedWarnLevel: none
 
 resources:
 - repo: self

.vsts-ci/windows/windows-packaging.yml

@@ -54,6 +54,8 @@ variables:
   - group: fakeNugetKey
   - name: SBOMGenerator_Formats
     value: spdx:2.2
+  - name: nugetMultiFeedWarnLevel
+    value: none
 
 resources:
   repositories:

tools/releaseBuild/azureDevOps/vpackRelease.yml

@@ -15,12 +15,14 @@ variables:
     value: 1
   - name: POWERSHELL_TELEMETRY_OPTOUT
     value: 1
+  - name: nugetMultiFeedWarnLevel
+    value: none
+
   - group: Azure Blob variable group
   # adds the pat to publish the vPack
   # instructions to create are in the description of the library
   - group: vPack
 
-
 stages:
 - stage: prep
   displayName: Create buildInfo and name the Pipeline