Merged PR 33055: Port copy blob changes

#### AI description  (iteration 1)
#### PR Classification
Code cleanup and configuration update.

#### PR Summary
This pull request updates the pipeline configuration for copying blobs to PSInfra storage.
- `.pipelines/templates/release-MakeBlobPublic.yml`: Added custom pool configuration and demands for `PowerShell1ES`. Simplified environment variable capture command.

.pipelines/templates/release-MakeBlobPublic.yml

@@ -10,7 +10,11 @@ jobs:
   displayName: Copy release to PSInfra storage
   dependsOn: CopyReleaseBlobApproval
   pool:
+    name: PowerShell1ES
     type: windows
+    isCustom: true
+    demands:
+    - ImageOverride -equals PSMMS2019-Secure
 
   variables:
   - group: 'PSInfraStorage'
@@ -107,7 +111,11 @@ jobs:
   displayName: Copy global tools to PSInfra storage
   dependsOn: CopyBlobApproval
   pool:
+    name: PowerShell1ES
     type: windows
+    isCustom: true
+    demands:
+    - ImageOverride -equals PSMMS2019-Secure
 
   variables:
   - group: 'PSInfraStorage'