runtime: Fix make test for virtcontainers.

[Sumynwa]

This commit fixes make test for virtcontainers. It fixes:
a. hypervisor_test::TestAssetPath by adding igvm asset path.
b. clh_test::TestCreateVM by setting testData expectError to false for ConfidentialGuest test config.
This is needed because we have allowed noneProtection for test purposes for Confidential configuration.

Merge Checklist

• Followed patch format from upstream recommendation: https://github.com/kata-containers/community/blob/main/CONTRIBUTING.md#patch-format
  • Included a single commit in a given PR - at least unless there are related commits and each makes sense as a change on its own.
• Aware about the PR to be merged using "create a merge commit" rather than "squash and merge" (or similar)
• The upstream/missing label (or upstream/not-needed) has been set on the PR.

Summary

Fix make test for src/runtime/virtcontainers.

Test Methodology

Local run tests:
go test --run TestAssetPath
go test --run TestClhCreateVm

[sprt]

Could you also set that test (and similar) as required in the GH UI?

[Sumynwa]

Could you also set that test (and similar) as required in the GH UI?

I don't have permissions to see the settings. @ms-mahuber can you help here. Below tests can be marked as Required:
build-checks (runtime, make test)
build-checks (runtime, sudo -E PATH="$PATH" make test)