Add changes for configuring macos support in spm (#12)

* add changes for configuring macos support in spm

* test latest version downloading artifacts

* update back to using latest from main

* update using latestfrombranch

---------

Co-authored-by: rachguo <rachguo@rachguos-Mini.attlocal.net>
Co-authored-by: rachguo <rachguo@rachguos-Mac-mini.local>

.pipelines/mac-ios-spm-dev-validation-pipeline.yml

@@ -23,8 +23,8 @@
         buildType: 'specific'
         project: 'Lotus'
         definition: 995          #'definitionid' is obtained from `System.DefinitionId` of ORT CI: onnxruntime-ios-packaging-pipeline
-        buildVersionToDownload: 'latest'
-        branchName: 'main'
+        buildVersionToDownload: 'latestFromBranch'
+        branchName: 'refs/heads/main'
         targetPath: '$(Build.ArtifactStagingDirectory)'
 
     - script: |