Exit early if context is marked as done (#2883)

Keeps the code from blocking and then failing immediately without sending a retry.

---

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

#### Issue(s)

* closes #2882

#### Test Plan

- [ ] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

src/internal/connector/graph/retry_middleware.go

@@ -42,9 +42,20 @@ func (middleware RetryHandler) retryRequest(
 
 		cumulativeDelay += delay
 
-		req.Header.Set(retryAttemptHeader, strconv.Itoa(executionCount))
+		timer := time.NewTimer(delay)
 
-		time.Sleep(delay)
+		select {
+		case <-ctx.Done():
+			// Don't retry if the context is marked as done, it will just error out
+			// when we attempt to send the retry anyway.
+			return resp, ctx.Err()
+
+		// Will exit switch-block so the remainder of the code doesn't need to be
+		// indented.
+		case <-timer.C:
+		}
+
+		req.Header.Set(retryAttemptHeader, strconv.Itoa(executionCount))
 
 		response, err := pipeline.Next(req, middlewareIndex)
 		if err != nil && !IsErrTimeout(err) {