Update module github.com/gruntwork-io/terratest to v0.40.6

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/gruntwork-io/terratest	require	patch	v0.40.4 -> v0.40.6

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Release Notes

gruntwork-io/terratest

### [`v0.40.6`](https://togithub.com/gruntwork-io/terratest/releases/v0.40.6) [Compare Source](https://togithub.com/gruntwork-io/terratest/compare/v0.40.5...v0.40.6) #### Modules affected - `git` #### Description - Added new function to retrieve the git repo root dir (`git.GetRepoRoot` and `git.GetRepoRootE`). #### Related links - [https://github.com/gruntwork-io/terratest/pull/1070](https://togithub.com/gruntwork-io/terratest/pull/1070) - [https://github.com/gruntwork-io/terratest/pull/1074](https://togithub.com/gruntwork-io/terratest/pull/1074) ### [`v0.40.5`](https://togithub.com/gruntwork-io/terratest/releases/v0.40.5) [Compare Source](https://togithub.com/gruntwork-io/terratest/compare/v0.40.4...v0.40.5) #### Modules affected - `terraform` - `test-structure` #### Description - Simplified implementation of `CopyTerraformFolderToTemp` by using `CopyTerraformFolderToDest` to avoid code duplication. There is no functional difference between this version and the previous version. #### Related links - [https://github.com/gruntwork-io/terratest/pull/1069](https://togithub.com/gruntwork-io/terratest/pull/1069) - [https://github.com/gruntwork-io/terratest/pull/1066](https://togithub.com/gruntwork-io/terratest/pull/1066)

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