Add support for AppMesh

[arnaldo2792]

Issue number:

Closes #1078

Description of changes:

This PR adds support for AppMesh in the ECS variant. The first-party patches to the ECS agent were regenerated, since a patch to remove the AppMesh CNI plugin from the list of supported CNI plugins was dropped. Thus, reviewers can ignore changes in patches 0001, 0003-0005.

In the packaging for the ECS agent, there is a patch to change the location of the log files created by the VPC CNI plugins (among other files). The VPC CNI plugins will ignore the default values for these log files if the environment variable VPC_CNI_LOG_FILE is set. The ECS agent does set this environment variable using the value overridden by the Bottlerocket patch. Thus, I decided to skip the creation of a patch similar to this, since even if the default log file location is changed, it won't have any effect. All CNI plugins will log to the same file in VPC_CNI_LOG_FILE, which is /var/log/ecs/ecs-cni-bridge-plugin.log in Bottlerocket.

I'm planning to do more clean up in the patches that are carried along with some suggestions that were given for the ECS agent spec file. I'll do that after this PR is merged.

Testing done:

• I confirmed internal testing for AppMesh is passing
• I followed this tutorial, with the appropiate changes to make it work for Bottlerocket (update the AMI id to be the one that I built, update the user data format), and confirmed that I can call the service that was created:

❯ curl $colorapp/color
{"color":"red", "stats": {"blue":0.21,"red":0.5,"white":0.29}}⏎
❯ curl $colorapp/color
{"color":"red", "stats": {"blue":0.2,"red":0.53,"white":0.27}}⏎
❯ curl $colorapp/color
{"color":"blue", "stats": {"blue":0.25,"red":0.5,"white":0.25}}⏎
❯ curl $colorapp/color
{"color":"white", "stats": {"blue":0.24,"red":0.47,"white":0.29}}⏎
❯ curl $colorapp/color
{"color":"blue", "stats": {"blue":0.28,"red":0.44,"white":0.28}}⏎
❯ curl $colorapp/color
{"color":"red", "stats": {"blue":0.26,"red":0.47,"white":0.26}}⏎
❯ curl $colorapp/color
{"color":"white", "stats": {"blue":0.25,"red":0.45,"white":0.3}}⏎

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[stmcginnis]

Looks good!