Whitelist CVE + Image name/regex

[jonny-wg2]

Referencing https://github.com/aquasecurity/trivy-operator/discussions/489#discussioncomment-3566772

In short, it would be great to improve the ignore file to whitelist a CVE and say an image name or some type of regex. The problem with the current setup is that some systems we can't update and need to accept the risk but others we can do something about.

E.g. CVE-XYZ123 registry.company.com/reg/teamname/appname:tag-1234 CVE-XYZ123 registry.company.com/reg/teamname/appname*