Update folder structure from alpha to 8.7

[hisImminence]

For the 8.7 release we need to update the folder names of docker compose from alpha to 8.7.

If possible we should align the release flow as well to the same as in the HCs: not having specfic workflows for alphas but streamline the releases and tests for all folders.

[hisImminence]

@hamza-m-masood as we need to release the Docker compose for 8.7 now, @jessesimpson36 will take care of this task ;)

--> https://github.com/camunda/camunda-distributions/pull/126/files

Thanks!