Require passing AWS bucket for integration tests (#3852)

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


#### Test Plan

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

src/internal/tester/tconfig/config.go

@@ -108,7 +108,7 @@ func ReadTestConfig() (map[string]string, error) {
 	testEnv := map[string]string{}
 	fallbackTo(testEnv, TestCfgStorageProvider, vpr.GetString(TestCfgStorageProvider))
 	fallbackTo(testEnv, TestCfgAccountProvider, vpr.GetString(TestCfgAccountProvider))
-	fallbackTo(testEnv, TestCfgBucket, os.Getenv("S3_BUCKET"), vpr.GetString(TestCfgBucket), "test-corso-repo-init")
+	fallbackTo(testEnv, TestCfgBucket, os.Getenv("S3_BUCKET"), vpr.GetString(TestCfgBucket))
 	fallbackTo(testEnv, TestCfgEndpoint, vpr.GetString(TestCfgEndpoint), "s3.amazonaws.com")
 	fallbackTo(testEnv, TestCfgPrefix, vpr.GetString(TestCfgPrefix))
 	fallbackTo(testEnv, TestCfgAzureTenantID, os.Getenv(account.AzureTenantID), vpr.GetString(TestCfgAzureTenantID))