Revert "Read secrets (#849)" (#850)

This reverts commit 0b586b8.

### Motivation and Context

<!-- Thank you for your contribution to the chat-copilot repo!
Please help reviewers and future users, providing the following
information:
  1. Why is this change required?
  2. What problem does it solve?
  3. What scenario does it contribute to?
  4. If it fixes an open issue, please link to the issue here.
-->

### Description

<!-- Describe your changes, the overall approach, the underlying design.
These notes will help understanding how your code works. Thanks! -->

### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [ ] The code builds clean without any errors or warnings
- [ ] The PR follows the [Contribution
Guidelines](https://github.com/microsoft/chat-copilot/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/chat-copilot/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [ ] All unit tests pass, and I have added new tests where possible
- [ ] I didn't break anyone 😄

.github/workflows/copilot-run-integration-tests.yml

@@ -20,7 +20,6 @@ on:
 
 permissions:
   contents: read
-  secrets: read
 
 jobs:
   tests:
@@ -29,8 +28,8 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - shell: pwsh
       - uses: actions/checkout@v4
+
       - name: Configure test environment
         working-directory: integration-tests
         env: