Add spdx3-validate to examples validation workflow

[bact]

• Add spdx3-validate to bin/check-examples.sh script
• spdx3-validate can handle spdxId references with ExternalMap
• It is currently used in https://github.com/spdx/spdx-examples/blob/master/.github/workflows/pull_request.yml
• This PR also modified bin/check-examples.sh to print relevant environment variables to assist debugging

[bact]

Validation failed due to individual-related issue. Turn to draft for now.

[bact]

The validation script can run and print results as expected. (But the validation result of the file being tested is failed)

[goneall]

It looks like the validation is failing - it also failed on a previous PR - so likely not do to these changes.

@bact - if you find the source of the failure, can you include a fix in this PR?

[bact]

@goneall the validation fail is from the known issue of missing CreationInfo for individuals.

We need to add it when generating the ontology file, with this PR https://github.com/spdx/spec-parser/pull/154 or similar.

[bact]

@goneall @zvr @ilans the CreationInfo issue is probably fixed now. But because of the assessedElement range update, the example failed. I will update the example and check again.

[bact]

@goneall @zvr @ilans The old 5 violations about missing CreationInfo are fixed. But we have new violations about new 5 cretionInfo_*.

I opened a separated issue for that at https://github.com/spdx/spdx-3-model/issues/936

[bact]

Example validation is passed now.

[bact]

@goneall please review this. All validations are passed now.

[bact]

• See also https://github.com/spdx/spdx-3-model/issues/956 for the need of spdx3-validate

[goneall]

Since it has been more than 10 days with 1 review, I'll go ahead and merge this PR