Add check using staticcheck (#1649)

## Description

Add linting using staticcheck. This is added as a separate check from golangci-lint as we were running into memory issues when running it via golangci-lint.

## Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [x] 💻 CI/Deployment
- [ ] 🐹 Trivial/Minor

## Issue(s)

<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* https://github.com/alcionai/corso/pull/1634

## Test Plan

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

.github/workflows/ci.yml

@@ -360,6 +360,10 @@ jobs:
       - name: Run go-licenses
         run: go-licenses check github.com/alcionai/corso/src --ignore github.com/alcionai/corso/src
 
+      - name: Run staticcheck
+        uses: dominikh/staticcheck-action@v1.2.0
+
+
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   # --- Publish steps ----------------------------------------------------------------------------------
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