[v10] Remove CSB CI Tests for Github

[DennisSmolek]

CSB CI is still running for some tests. Lets unify on all github actions moving forward

[DennisSmolek]

So to clarify, CSB is running to give a preview env. But I'm not sure its running correctly with the new monorepo setup.

The problem is CSB CI is pretty abandoned. Docs only mention up to Node 18 support (current LTS is 24) and we already have to diverge from the github actions builds and tests to run on CSB. I need to test a preview and see if its worth it to keep

[krispya]

Big support cutting it out.

[DennisSmolek]

Removed in alpha 3