Update dotnet from 6.0 to 8.0

[popalex]

Update dotnet version from 6.0 to 8.0, latest LTS version at this time.

Signed-off-by: Alex Popescu pop.alx@gmail.com

[ibuziuk]

@popalex thanks for the contribution, could you please sign off the commit - https://github.com/devfile/developer-images/pull/171/checks?check_run_id=24622985445
@svor are we good to bump the .net version?

[popalex]

@popalex thanks for the contribution, could you please sign off the commit - https://github.com/devfile/developer-images/pull/171/checks?check_run_id=24622985445

done.

[svor]

@popalex thanks for the contribution, could you please sign off the commit - https://github.com/devfile/developer-images/pull/171/checks?check_run_id=24622985445 @svor are we good to bump the .net version?

@ibuziuk changes are good to me. Only the problem with image build: https://github.com/devfile/developer-images/actions/runs/8966779944/job/24670229942?pr=171, but I don't think it's related to the current changes

[ibuziuk]

@musienko-maxim could you please take a look at why the PR check is failing ?

[svor]

the build fails because of eclipse-che/che#22957

[svor]

@popalex could you please rebase your PR to pick up the latest changes from main branch, they contain the fix of image build problem

[popalex]

Done I think.

[openshift-ci]

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