chore: Gitlab e2e tests

[gabedos]

What does this PR do?

Runs the integration tests for the terraform-aws-ecs-datadog.

1. Creates the task definitions in the specified AWS account.
2. Verifies expected attributes of the task definitions
3. Deletes the task definitions

Also removes inference_accelerator as a configuration option for the ECS task definition due to incompatibility with AWS provider v6.

Motivation

CI

Describe how you validated your changes

CI

Additional Notes

terraform apply command requires ecs:DescribeTaskDefinition on * task definition resources. Otherwise it throws an error stating "Couldn't find resource" without surfacing a permission denied error.

Similarly terraform destroy command requires ecs:DeregisterTaskDefinition on *

[gabedos]

We restrict support for the package to AWS provider version 5.77.0+. The CI decided to pick up the most recent version being 6.0.0. This caused an error to be thrown for the inference accelerator being an unexpected field.

The inference accelerator was never a supported field in Fargate, however, we still had code written to attempt to create an inference accelerator if the user defined one. Originally, this would only throw an error if the user actually defined an accelerator, but now it throws an error even if the value is null.

Therefore, we can remove the inference_accelerator field without any negative reverse impacts on 5.77+. The only difference will be that we ignore their incorrectly defined inference_accelerator field on ECS Fargate tasks because it should never be there in the first place.

[gabedos]

/merge

[dd-devflow]

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2025-06-25 22:30:54 UTC ℹ️ Start processing command /merge

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2025-06-25 22:30:58 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in main is approximately 0s (p90).

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2025-06-25 22:34:15 UTC 🚨 MergeQueue: This merge request is in error

mergequeue build completed successfully, but the github api returned an error while merging the pr

Details

Error: PUT https://api.github.com/repos/DataDog/terraform-aws-ecs-datadog/pulls/26/merge: 405 Merge commits are not allowed on this repository. [] (Request ID: 6B61:130718:8CE608:1197838:685C7961)

FullStacktrace:
activity error (type: github.GithubService_MergePullRequest, scheduledEventID: 41, startedEventID: 42, identity: 1@github-worker-8f7cd5c59-hw2fc@): PUT https://api.github.com/repos/DataDog/terraform-aws-ecs-datadog/pulls/26/merge: 405 Merge commits are not allowed on this repository. [] (Request ID: 6B61:130718:8CE608:1197838:685C7961) (type: GitFailure, retryable: false): PUT https://api.github.com/repos/DataDog/terraform-aws-ecs-datadog/pulls/26/merge: 405 Merge commits are not allowed on this repository. [] (type: ErrorResponse, retryable: true)