[Microsoft.Sbom.Targets] License detection properties have no effect

These properties don't take effect when I set them in my project:

<PropertyGroup>
    <SbomGenerationFetchLicenseInformation>true</SbomGenerationFetchLicenseInformation>
    <SbomGenerationEnablePackageMetadataParsing>true</SbomGenerationEnablePackageMetadataParsing>
</PropertyGroup>

They are passed to parameters of the GenerateSbom task, but the resulting SBOM contains no license information, and the SBOMTelemetry log entry shows FetchLicenseInformation=null, EnablePackageMetadataParsing=null.

If I instead use sbom-tool with -pm true -li true, then the SBOM shows "licenseConcluded": "MIT" and/or "licenseDeclared": "MIT" for some packages, so the bug is in the MSBuild integration.

AFAICT, src/Microsoft.Sbom.Targets/SbomCLIToolTask.cs for .NET Framework uses those parameters (but then fails because of https://github.com/microsoft/sbom-tool/issues/719), but src/Microsoft.Sbom.Targets/GenerateSbomTask.cs for .NET Core ignores the parameters.

Originally posted by @KalleOlaviNiemitalo in https://github.com/microsoft/sbom-tool/issues/693#issuecomment-2341488913

Start with src/Microsoft.Sbom.Targets/GenerateSbomTask.cs and compare its handling of the two license-related parameters with src/Microsoft.Sbom.Targets/SbomCLIToolTask.cs. Reproduce the MSBuild integration case using the properties from the issue, then verify that SBOM license fields and the SBOMTelemetry values reflect them.