Bump github.com/gruntwork-io/terratest from 0.37.12 to 0.38.2

Bumps [github.com/gruntwork-io/terratest](https://github.com/gruntwork-io/terratest) from 0.37.12 to 0.38.2.
- [Release notes](https://github.com/gruntwork-io/terratest/releases)
- [Commits](gruntwork-io/terratest@v0.37.12...v0.38.2)

---
updated-dependencies:
- dependency-name: github.com/gruntwork-io/terratest
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -5,8 +5,6 @@ go 1.16
 require (
 	github.com/Azure/azure-sdk-for-go v54.3.0+incompatible
 	github.com/Azure/go-autorest/autorest/azure/auth v0.5.8
-	github.com/Azure/go-autorest/autorest/to v0.4.0 // indirect
-	github.com/Azure/go-autorest/autorest/validation v0.3.1 // indirect
 	github.com/glendc/go-external-ip v0.0.0-20200601212049-c872357d968e
-	github.com/gruntwork-io/terratest v0.37.12
+	github.com/gruntwork-io/terratest v0.38.2
 )