[Ubuntu] Fix .NET SDK extraction

[lumarel]

Description

We noticed in our own builds, that the extra home repository sourced .NET SDKs are missing.
This should fix that.

Fixes #10656

Related issue:

Check list

• Related issue / work item is attached
• Tests are written (if applicable)
• Documentation is updated (if applicable)
• Changes are tested and related VM images are successfully generated

[subir0071]

Our pipeline points that there is no issue with the ,Net script for Ubuntu24.
Also, there has been no adverse comments or feedback about any user workflow/processes failing for the last few months.

Hence we close this PR as no planned.

[lumarel]

Our pipeline points that there is no issue with the ,Net script for Ubuntu24. Also, there has been no adverse comments or feedback about any user workflow/processes failing for the last few months.

Hence we close this PR as no planned.

@subir0071 I'm fine with that, though the difference we see with this fix is the following one:

177c177
< - .NET Core SDK: 6.0.428, 8.0.406, 9.0.200
---
> - .NET Core SDK: 6.0.428, 8.0.113, 8.0.206, 8.0.309, 8.0.406, 9.0.103, 9.0.200

Another solution would be to remove the part that downloads the additional sdk bundles, as these are basically bloating the image right now.