Use babashka tasks for CI tasks and tooling

[jsmassa]

@TimoKramer Could we use a more recent Docker image for the CI pipeline or is there a reason not to update? If I understand it correctly, each new docker image release also includes a new babashka release and with version 0.8.0 it is more convenient to use additional tooling via pods (the current image uses babashka 0.7.4).

[TimoKramer]

@TimoKramer Could we use a more recent Docker image for the CI pipeline or is there a reason not to update? Updated the base images to latest version available

[jsmassa]

Thank you :)

[TimoKramer]

Just FYI:

:format/cljfmt checks the format of all project files (or a given file)
:format/cljfmt! automatically formats all the project files (or a given file)

That's how practically names them functions.