Modify generate-release-vars.sh to include ecs init, docker, and containerd versions similar to previous release vars

[hozkaya2000]

Summary

After the previous PRs for modifying generate-release-vars.sh and release files structure to change only specific AMIs release files, including information of dependency versions such as ECS Init, Docker, Containerd, ExecSSM was deemed useful in the release files. Therefore, the script has been updated to reflect this decision.

The reason including these dependencies are useful is to check whether any of these dependencies have been updated since the last release. Since the Agent Team will update the values of these dependencies in the variables.pkr.hcl file, the ./generate-release-vars.sh script will pull and update the release variables files. If there is a change in these dependencies from the previous release file, that means that the agent team has changed one of the dependency versions from last time, indicating the need for an update. The generate config action will pick up on this change and realize that a release is necessary, and kick it off.

Note that this script is modifying the template of the release-{ami_type}.auto.pkrvars.hcl files, since they were not modified to consider this use case before.

Implementation details

Add extraction of versions from the default values in the variables.pkr.hcl file, and use the extracted versions in the update of release-{ami_type}.auto.pkrvars.hcl file.

Testing

The script was run for each type of AMI locallly, successfully modifying each file as desired, and extracting the correct version from the variables.pkr.hcl file. The variables.pkr.hcl file was modified to exaggerate these differences and see them reflected at test time.

Other than that, here is the output of three test runs today:
Note that the version is automatically given as today, but these changes will NOT be pushed unless anything EXCEPT the ami_version has changed. This is implemented in the GenerateConfig Github Action.

./generate-release-vars.sh al1

ami_version        = "20231130"
ecs_version_al1    = "1.51.0"
docker_version_al1 = "20.10.13"
exec_ssm_version   = "3.2.1630.0"
source_ami_al1     = "amzn-ami-minimal-hvm-2018.03.0.20231106.0-x86_64-ebs"

./generate-release-vars.sh al2

ami_version                   = "20231130"
ecs_agent_version             = "1.79.0"
ecs_init_rev                  = "1"
docker_version                = "20.10.25"
containerd_version            = "1.6.19"
exec_ssm_version              = "3.2.1630.0"
source_ami_al2                = "amzn2-ami-minimal-hvm-2.0.20231116.0-x86_64-ebs"
source_ami_al2arm             = "amzn2-ami-minimal-hvm-2.0.20231116.0-arm64-ebs"
source_ami_al2kernel5dot10    = "amzn2-ami-minimal-hvm-2.0.20231116.0-x86_64-ebs"
source_ami_al2kernel5dot10arm = "amzn2-ami-minimal-hvm-2.0.20231116.0-arm64-ebs"

./generate-release-vars.sh al2023

ami_version                 = "20231130"
ecs_agent_version           = "1.79.0"
ecs_init_rev                = "1"
docker_version_al2023       = ""
containerd_version_al2023   = "1.6.19"
exec_ssm_version            = "3.2.1630.0"
source_ami_al2023           = "al2023-ami-minimal-2023.2.20231113.0-kernel-6.1-x86_64"
source_ami_al2023arm        = "al2023-ami-minimal-2023.2.20231113.0-kernel-6.1-arm64"
kernel_version_al2023       = "-kernel-6.1"
kernel_version_al2023arm    = "-kernel-6.1"
distribution_release_al2023 = "2023.2.20231113"

New tests cover the changes: yes

Description for the changelog

Include ECS Init, Docker, and Containerd versions in release files for each AMI type.

Licensing

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.