feat: add configurable AWS route creation and deletion timeouts

[morremeyer]

what

• Adds configurable timeouts for AWS route creation and deletion

why

• Route creation and deletion can take longer than the provider defaults of 2m (creation) and 5m (deletion)

references

• Default timeouts set as they are in the provider, see https://registry.terraform.io/providers/hashicorp/aws/3.69.0/docs/resources/route#timeouts.
• Already implemented for terraform-aws-dynamic-subnets, this PR does the same for this module.

[nitrocode]

/test all

[nitrocode]

/test all

[nitrocode]

I used the default 5m timeout for create, removed the null provider, and hopefully copying versions.tf into examples/complete will fix the tests.

[nitrocode]

Thanks @morremeyer !