[receiver/awsecscontainermetrics] migrate semconv from v1.21.0

[codeboten]

Component(s)

receiver/awsecscontainermetrics

Describe the issue you're reporting

While removing usage of old semconv imports, i found that this package uses semantic conventions that rely on v1.21.0. Specifically the following attributes:

container.image.tag

[github-actions]

Pinging code owners for receiver/awsecscontainermetrics: @Aneurysm9. See Adding Labels via Comments if you do not have permissions to add labels yourself. For example, comment '/label priority:p2 -needs-triage' to set the priority and remove the needs-triage label.

[github-actions]

Pinging code owners:

• receiver/awsecscontainermetrics: @Aneurysm9

See Adding Labels via Comments if you do not have permissions to add labels yourself.