feat: Added support for ephemeral storage (requires AWS provider version 4.8.0)

[liortct]

Description

Add support for configuring ephemeral storage size (/tmp file system) for lambda.

The changes include:

• Upgrade AWS provider version to 4.8.0, which introduces support for the ephemeral storage size configuration feature.
• Add a variable called ephemeral_storage_size and use this value in the main.tf.
• Replace deprecated resource aws_s3_bucket_object to aws_s3_object.
• Add an example for using the ephemeral_storage_size configuration.

Motivation and Context

The ephemeral storage configuration is a new feature in AWS lambda. I would like to be able to use this feature via Terraform.

Fixes #290

Breaking Changes

• The Terffaform AWS provider version must be upgraded from >=3.6.9 to >=4.8.0.
  This upgrade is required as the ephemeral_storage configuration is added in version 4.8.0 of the AWS provider plugin - [Feature] Lambda Support for Ephemeral Storage upto 10GB hashicorp/terraform-provider-aws#23873.
• Additionally I changed every use of aws_s3_bucket_object to aws_s3_object because aws_s3_bucket_object is deprecated - https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/s3_bucket_object.

How Has This Been Tested?

I have added a new exame for this feature at example/ephemeral-storage that uses the new feature.
I have tested the new change via the terraform validate command.

[antonbabenko]

Good and quick one! Please remove the example folder you added but add just one argument (ephemeral_storage_size = 10240) to examples/complete/main.tf in module lambda_function.

[liortct]

@antonbabenko

Good and quick one! Please remove the example folder you added but add just one argument (ephemeral_storage_size = 10240) to examples/complete/main.tf in module lambda_function.

Done

[antonbabenko]

Merging like this. The feature is working as expected but currently examples/complete is failing due to the S3 bucket module is not being compatible with AWS provider v4 (terraform-aws-modules/terraform-aws-s3-bucket#139).

[antonbabenko]

This PR is included in version 2.37.0 🎉

[jaikanthjay46]

@antonbabenko People's scripts are going to break even if they have pinned this to v2 . Not all modules have been updated to support provider v4.

Since its a breaking change, it could have been timed better.

[antonbabenko]

@jaikanthjay46 Good point! I missed this yesterday. I will make a major release instead.

[antonbabenko]

This PR is included in version 3.0.0 🎉

[jaikanthjay46]

Thanks @antonbabenko, appreciate your rapid response 🥳 . You have single handedly stopped a StackOverflow exodus from happening.

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