Fix bug from generation of model names

[rkodev]

Models that were flattened, i.e moved from deeper packages to level 2 pakages relied on the package names to prefix the deeper model name. Chnages introduced by package name case normalization affecting camel casing in names.

This resolves microsoftgraph/msgraph-sdk-go#721

There are failing tests for correcting the package name casing

[baywet]

@rkodev can you queue a smoke generation to ensure this fixes the problem please?
Also I'd like us to add retract directives for the impacted versions.
https://go.dev/ref/mod#go-mod-file-retract

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[rkodev]

@rkodev can you queue a smoke generation to ensure this fixes the problem please? Also I'd like us to add retract directives for the impacted versions. https://go.dev/ref/mod#go-mod-file-retract

Smoke generation with the fix https://github.com/microsoftgraph/msgraph-sdk-go/blob/v1.0/pipelinebuild/154506/users/item_get_member_groups_response.go#L12

https://dev.azure.com/microsoftgraph/Graph%20Developer%20Experiences/_build/results?buildId=154506&view=results