SBOM: add support for CycloneDX v1.5 and add HOST_IMAGE SBOMSourceType

[jinroh]

What does this PR do?

Two changes in sbom.proto:

• Adds CycloneDX v1.5 from https://raw.githubusercontent.com/CycloneDX/specification/master/schema/bom-1.5.proto
• Adds a new HOST_IMAGE source type

Motivation

cc @Bit-Doctor

Additional Notes

Possible Drawbacks / Trade-offs

Describe how to test/QA your changes

Reviewer's Checklist

Reviewers: please see the review guidelines.

[L3n41c]

I’m wondering if it would make sense to rename that field cyclonedx_1_4 for homogeneity with the new field.

Suggested change

	cyclonedx.v1_4.Bom cyclonedx = 10; // only cyclonedx will be supported initially but putting it optional will allow us to move to another format later
	cyclonedx.v1_4.Bom cyclonedx_1_4 = 10; // only cyclonedx will be supported initially but putting it optional will allow us to move to another format later

It would be a non source compatible change that will require to update:

• the datadog-agent code here
• the dd-source code here and here
• full list here

when bumping the version of agent-payload in those repositories.
But as long as the ID (10) remains unchanged, it has no impact on the on-wire message.

[jinroh]

Agreed. Can we plan that in another PR ?

[jinroh]

Or we can re-open two separate PRs. One for HOST_IMAGE and one for clyclonedx 1.5.x. That'll make things easier for us.