Check for software license violations using SPDX identifiers

What does this MR do?

License names can change and some of our underlying tooling for performing the license scans can sometimes produce different names for the same logical license. This change attempts to update the detection by matching on the SPDX identifier instead of just the name. I have left name matching for cases where an SPDX identifier is not available for a custom, user-entered license.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Performance and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team

#13083 (closed)