[Makefile] Fix docker-otelcontribcol make target

[dmitryax]

This change reverts #12217 that broke docker-otelcontribcol make target as an incorrect attempt to create multi arch docker images.

This change also removes the changelog entry line for #12217 since it's not a user facing change.

[jpkrohling]

cc @gyliu513

[gyliu513]

@dmitryax I do have a questions here: How can I run this on non linux amd64 platforms?

[dmitryax]

@gyliu513 you cannot at this point. If you want, please submit a PR that produces a multi-arch docker image from make docker-otelcontribcol or make it produce an image for host arch but don't change $GOOS.

[gyliu513]

@dmitryax what is the difference from make docker-component and make docker-otelcontribcol, I can see make docker-otelcontribcol is the only one who is calling make docker-component, am I missing anything? Thanks!