CI: use aws ECR insteand of Docker Hub

[marcoieni]

Close rust-lang/infra-team#176

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[marcoieni]

I expect the authentication to fail, let's see. Probably we need to add the permissions ecr-public:GetAuthorizationToken and sts:GetServiceBearerToken

[Kobzol]

After the authentication works, we should also check whether it is still possible to build these Dockerfiles locally after these changes.

[marcoieni]

It's possible, I tried, you are subject to the unauthenticated rate limit, as dockerhub. This is discussed in the linked issue 👍

[Kobzol]

I see, ok :) Awesome.

[rust-log-analyzer]

A job failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

info: removing cargo home
info: removing rustup binaries
info: rustup is uninstalled

usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
To see help text, you can run:
  aws help
  aws help
  aws <command> help
  aws <command> <subcommand> help
aws: error: the following arguments are required: value

##[error]Process completed with exit code 252.
Post job cleanup.

[marcoieni]

it might be that since I'm in a fork we can't use the secret to authenticate with aws?

[bors]

☔ The latest upstream changes (presumably #133809) made this pull request unmergeable. Please resolve the merge conflicts.

[bors]

☔ The latest upstream changes (presumably #134614) made this pull request unmergeable. Please resolve the merge conflicts.

[marcoieni]

we decided that ECR isn't a good fit.