feat(ISV-5571): ignore SBOM-related task errors in rh-advisories

[wcheang]

Describe your changes

Failing to process or upload SBOMs should not fail the whole rh-advisories pipeline. This change ensures that the pipeline will continue even if there are errors in the SBOM-related tasks.

Relevant Jira

https://issues.redhat.com/browse/ISV-5571

Checklist before requesting a review

• I have marked as draft or added do not merge label if there's a dependency PR
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• My commit message includes Signed-off-by: My name <email>
• I have bumped the task/pipeline version string and updated changelog in the relevant README
• I read CONTRIBUTING.MD and commit formatting

[openshift-ci]

Hi @wcheang. Thanks for your PR.

I'm waiting for a konflux-ci member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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