[CI] Fix ivas-conformance and re-enable job in push-to-main pipeline
- For awareness CI TF: @kiene, @pihlajakuja, @pajunen
This is a fix of the ivas-conformance job, see https://forge.3gpp.org/rep/ivas-codec-pc/ivas-codec/-/pipelines/32605
The job is also re-enabled in the push-to-main pipeline.