chown aws-iam-authenticator to avoid permission denied

[wongma7]

Fixing the issue in #301 in a less controversial way :)

go builds binaries with permissions like so:

$ ls -la dist/goreleaserdocker010310734/aws-iam-authenticator 
-rwx------. 7 fedora fedora 38055936 Mar 13 20:39 dist/goreleaserdocker010310734/aws-iam-authenticator*

and user 10000/aws-iam-authenticator then gets permission denied when trying to run it:

$ make build
...
$ docker run 602401143452.dkr.ecr.us-west-2.amazonaws.com/amazon/aws-iam-authenticator:v0.5.0-debian-stretch
standard_init_linux.go:211: exec user process caused "permission denied"

After these changes the containers work as expected,

$ make build
...
$ 
docker run 602401143452.dkr.ecr.us-west-2.amazonaws.com/amazon/aws-iam-authenticator:v0.5.0-debian-stretch
A tool to authenticate to Kubernetes using AWS IAM credentials
...

[christopherhein]

Does it still make sense to have these Dockerfiles? Given that core has moved to distroless and subprojects like kubebuilder, cluster-api, etc has as well, it seems like that should be the path this the authenticator is going too.

[wongma7]

Does it still make sense to have these Dockerfiles? Given that core has moved to distroless and subprojects like kubebuilder, cluster-api, etc has as well, it seems like that should be the path this the authenticator is going too.

I had exactly this thought when making the same change to 6 almost-identical files... IMO no, I can clean up the Dockerfiles in a follow-up but mainly this PR is to unblock my testing for #303

[christopherhein]

/lgtm
/approve

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