Sanity tests improvements (#3439)

- Fix how inputs are passed for sanity tests
- Fix timestamp generated
- use go build instead of make when building corso

---

#### 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

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [x] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issue(s)

<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* #<issue>

#### Test Plan

<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

.github/workflows/sanity-test.yaml

@@ -60,7 +60,7 @@ jobs:
         with:
           go-version-file: src/go.mod
 
-      - run: make build
+      - run: go build -o corso
       - run: go build -o sanity-test ./cmd/sanity_test
 
       - run: mkdir ${TEST_RESULT}
@@ -79,17 +79,17 @@ jobs:
       - name: Set purge boundary
         if: always()
         run: |
-          echo "NOW=$(date +"%Y-%m-%d_%H-%M-%S")" >> $GITHUB_ENV
+          echo "NOW=$(date +"%Y-%m-%dT%H:%M:%SZ")" >> $GITHUB_ENV
 
       - name: Purge CI-Produced Folders for Users
         uses: ./.github/actions/purge-m365-data
         with:
-          user: ${TEST_USER}
-          folder-prefix: ${RESTORE_DEST_PFX}
+          user: ${{ env.TEST_USER }}
+          folder-prefix: ${{ env.RESTORE_DEST_PFX }}
           older-than: ${{ env.NOW }}
-          azure-client-id: ${AZURE_CLIENT_ID}
-          azure-client-secret: ${AZURE_CLIENT_SECRET}
-          azure-tenant-id: ${AZURE_TENANT_ID}
+          azure-client-id: ${{ env.AZURE_CLIENT_ID }}
+          azure-client-secret: ${{ env.AZURE_CLIENT_SECRET }}
+          azure-tenant-id: ${{ env.AZURE_TENANT_ID }}
           m365-admin-user: ${{ secrets.M365_TENANT_ADMIN_USER }}
           m365-admin-password: ${{ secrets.M365_TENANT_ADMIN_PASSWORD }}
 
@@ -97,13 +97,13 @@ jobs:
         if: always()
         uses: ./.github/actions/purge-m365-data
         with:
-          site: ${TEST_SITE}
-          folder-prefix: ${RESTORE_DEST_PFX}
+          site: ${{ env.TEST_SITE }}
+          folder-prefix: ${{ env.RESTORE_DEST_PFX }}
           libraries: ${{ vars.CORSO_M365_TEST_SITE_LIBRARIES }} 
           older-than: ${{ env.NOW }}
-          azure-client-id: ${AZURE_CLIENT_ID}
-          azure-client-secret: ${AZURE_CLIENT_SECRET}
-          azure-tenant-id: ${AZURE_TENANT_ID}
+          azure-client-id: ${{ env.AZURE_CLIENT_ID }}
+          azure-client-secret: ${{ env.AZURE_CLIENT_SECRET }}
+          azure-tenant-id: ${{ env.AZURE_TENANT_ID }}
           m365-admin-user: ${{ secrets.M365_TENANT_ADMIN_USER }}
           m365-admin-password: ${{ secrets.M365_TENANT_ADMIN_PASSWORD }}