standalone,testcase: integrate nxdbom

This needs nxdbom to be installed and to be in PATH. When enabled, this
will run nxdbom after building software to produce SBOM both in text and
cyclonedx formats.
Status Job ID Name Coverage
  External
failed SlapOS.SoftwareReleases.IntegrationTest-TestRunner1

08:45:54

failed SlapOS.SoftwareReleases.IntegrationTest-zope4py3-jerome

10:28:13

failed SlapOS.SoftwareReleases.IntegrationTest-TestRunner1

16:11:18

failed SlapOS.SoftwareReleases.IntegrationTest-TestRunner1

08:51:59