feat(sbom): add support for sbom test

[j-luong]

Manual testing:
As described in CONTRIBUTING.md:

• download and configure teamcity
• build the plugin as described in the local testing section
• upload and enable the local version of the plugin
• configure a test project
• configure the build job by adding a Snyk plugin step with the following config

- run build job

[snyk-io]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scanner	Critical	High	Medium	Low	Total (0)
✅	Licenses	0	0	0	0	0 issues
✅	Code Security	0	0	0	0	0 issues
✅	Open Source Security	0	0	0	0	0 issues

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[j-luong]

note: These tests have questionable value, as the command is not actually executed. The TeamCity framework makes proper testing of the command difficult because of things like final methods & protected access requiring extensive mocking.

open to suggestions on how to better do this.