Type out path instead of using env (#3254)

Env inside of an env declaration isn't allowed it seems.

---

#### Does this PR need a docs update or release note?

- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No

#### Type of change

- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [x] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

.github/workflows/sanity-test.yaml

@@ -30,7 +30,7 @@ jobs:
       AZURE_TENANT_ID: ${{ secrets.TENANT_ID }}
       CORSO_BUCKET: ${{ secrets.CI_TESTS_S3_BUCKET }}
       CORSO_LOG_DIR: testlog
-      CORSO_LOG_FILE: ${{ env.CORSO_LOG_DIR }}/testlogging.log
+      CORSO_LOG_FILE: testlog/testlogging.log
       CORSO_M365_TEST_USER_ID: ${{ github.event.inputs.user != '' && github.event.inputs.user || vars.CORSO_M365_TEST_USER_ID }}
       CORSO_PASSPHRASE: ${{ secrets.INTEGRATION_TEST_CORSO_PASSPHRASE }}
       TEST_RESULT: test_results