Bump hashicorp/random in /tests/integration-tests/setup

Bumps [hashicorp/random](https://github.com/hashicorp/terraform-provider-random) from 3.7.2 to 3.8.1.
- [Release notes](https://github.com/hashicorp/terraform-provider-random/releases)
- [Changelog](https://github.com/hashicorp/terraform-provider-random/blob/main/CHANGELOG.md)
- [Commits](hashicorp/terraform-provider-random@v3.7.2...v3.8.1)

---
updated-dependencies:
- dependency-name: hashicorp/random
  dependency-version: 3.8.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

tests/integration-tests/setup/main.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     random = {
       source  = "hashicorp/random"
-      version = "3.7.2"
+      version = "3.8.1"
     }
   }
 }