Remove inference accelerator input to be forward compatible with AWS provider v6

[lujamitch]

inference_accelerator attribute + argument for aws_ecs_task_definition was removed in recent AWS provider upgrade to v6. see here

In this PR:

• Removed inference accelerator from core/service and core/task
• Update examples to AWS provider v6 and Terraform 1.5.7 (mainly to make pre-commit happy)
• Update documentation

This PR only intends to make the module forward compatible with 6.0, this is not an upgrade to 6.0

Resolves #40

[lujamitch]

The recent upgrade to the aws_provider has broke some of the examples.

The asg module currently has a PR open to fix this.

The vpc module has enforced >=6.0, so maybe for examples we will have to use 6.0 in order to pass the pre-commit, and the Terraform to be valid.

[FurqanHabibi]

Thank you for working on this!

so maybe for examples we will have to use 6.0 in order to pass the pre-commit, and the Terraform to be valid.

I agree with you. Let's bump-up to v6 on the examples!

[michaelaw320]

Tests are failing, can you take a look at what terraform validate is not happy with?

[lujamitch]

Tests are failing, can you take a look at what terraform validate is not happy with?

@michaelaw320
Need to up Terraform version for the examples to support the new versions of the modules, then it should be ok.

[hanscg]

LGTM, thanks!

[FurqanHabibi]

Thank you 🙏