Set WorkingDirectory so the dotnet tools install works on non-windows (Azure#33070)

Co-authored-by: James Suplizio <jasupliz@microsoft.com>

Author: azure-sdk

eng/common/pipelines/codeowners-linter.yml

@@ -20,6 +20,7 @@ stages:
 - stage: Run
   variables:
     skipComponentGovernanceDetection: true
+    nugetMultiFeedWarnLevel: 'none'
 
   jobs:
   - job: Run
@@ -42,6 +43,8 @@ stages:
           command: custom
           custom: 'tool'
           arguments: 'install --global --add-source "$(DotNetDevOpsFeed)" --version "$(CodeownersLinterVersion)" "Azure.Sdk.Tools.CodeownersLinter"'
+          workingDirectory: '$(Build.SourcesDirectory)/eng/common'
       - pwsh: |
           codeowners-linter --repoRoot $(Build.SourcesDirectory) --repoName $(Build.Repository.Name) -fbl -rUri "$(RepoLabelUri)" -tUri "$(TeamUserUri)" -uUri "$(UserOrgUri)"
         displayName: 'Lint CODEOWNERS and filter using baseline'
+        workingDirectory: '$(Build.SourcesDirectory)/eng/common'