Merged PR 4490: eng | Remove netstandard from production pipeline

- Complementary code change of PR [#2386](#2386).
- This should be merged after merging the related PR to remove support of .NET Standard in the production pipeline.
- The first commit has the related PR's changes(review them on GH).
- After having merged the related GH PR and updating the CI pipeline, I'll sync with this PR to unify the changes and get passed the pipeline.
- Only the YAML changes under the `eng` folder should be reviewed (ignore the other changes as they are identical to the GH).
- Introduced `oneBranchType` parameter to switch between **Official** and **NonOfficial** templates

- [new sample run](https://dev.azure.com/SqlClientDrivers/ADO.Net/_build/results?buildId=86908&view=results)

Related work items: #30122

eng/pipelines/common/templates/jobs/validate-signed-package-job.yml

@@ -115,7 +115,7 @@ jobs:
     displayName: 'Check expected folder names'
 
   - powershell: |
-      # Checks the version of DotNetFramework, NetStandard and NetCore
+      # Checks the version of DotNetFramework and DotNet
       $countErr = 0
       $countPass = 0
       $excludNamesFromRuntimeFolder = 'lib','win','unix'
@@ -260,11 +260,11 @@ jobs:
               
               if($pVersion.FileVersion -eq '${{parameters.assembly_file_version_core}}')
               {
-                    Write-Host 'Correct File version Detected for netcore and netstandard,' $pVersion.FileVersion -ForegroundColor Green
+                    Write-Host 'Correct File version Detected for netcore,' $pVersion.FileVersion -ForegroundColor Green
               }
               else
               {
-                  Write-Host 'Wrong File version Detected for netcore and netstandard and ref folder of netfx,' $pVersion.FileVersion -ForegroundColor Red
+                  Write-Host 'Wrong File version Detected for netcore and ref folder,' $pVersion.FileVersion -ForegroundColor Red
                   Exit -1
               }
           }

eng/pipelines/common/templates/steps/build-all-configurations-signed-dlls-step.yml

@@ -39,13 +39,6 @@ steps:
       msbuildArguments: '-p:AssemblyFileVersion=${{parameters.AssemblyFileVersion }} -t:BuildAllConfigurations -p:GenerateNuget=false -p:SignAssembly=true -p:AssemblyOriginatorKeyFile=$(Agent.TempDirectory)\netfxKeypair.snk'
 
 - ${{ if eq(parameters.product, 'AKV') }}:
-  - task: MSBuild@1
-    displayName: 'BuildAKVNetStAllOS using build.proj'
-    inputs:
-      solution: '**/build.proj'
-      configuration: '$(Configuration)'
-      msbuildArguments: '-p:AssemblyFileVersion=${{parameters.AssemblyFileVersion }} -t:BuildAKVNetStAllOS -p:NugetPackageVersion=${{parameters.nugetPackageRefVersion }} -p:ReferenceType=Package -p:SignAssembly=true -p:AssemblyOriginatorKeyFile=$(Agent.TempDirectory)\netfxKeypair.snk'
-
   - task: MSBuild@1
     displayName: 'BuildAKVNetFx using build.proj'
     inputs:

eng/pipelines/common/templates/steps/copy-dlls-for-test-step.yml

@@ -28,8 +28,6 @@ parameters:
     - net462
     - net6.0
     - net8.0
-    - netstandard2.0
-    - netstandard2.1
 
   - name: product
     default: MDS

eng/pipelines/dotnet-sqlclient-signing-pipeline.yml

@@ -52,6 +52,12 @@ parameters: # parameters are shown up in ADO UI in a build queue time
   displayName: 'Lowest supported .NET Framework version (MDS validation)'
   type: string
   default: 'net462'
+- name: oneBranchType
+  displayName: 'Select OneBranch template'
+  default: Official
+  values:
+  - NonOfficial
+  - Official
 
 variables:
   - template: /eng/pipelines/libraries/variables.yml@self
@@ -74,7 +80,7 @@ resources:
       ref: refs/heads/main
 
 extends:
-  template: v2/OneBranch.Official.CrossPlat.yml@templates # https://aka.ms/obpipelines/templates
+  template: v2/OneBranch.${{parameters.oneBranchType }}.CrossPlat.yml@templates # https://aka.ms/obpipelines/templates
   parameters:
     featureFlags:
       WindowsHostVersion: 1ESWindows2022

eng/pipelines/libraries/mds-validation-variables.yml

@@ -15,7 +15,7 @@ variables:
   - name: expectedFolderNames
     value: lib,ref,runtimes
   - name: expectedDotnetVersions
-    value: net462,net6.0,net8.0,netstandard2.0,netstandard2.1
+    value: net462,net6.0,net8.0
   - name: Database
     value: Northwind
   - name: platform