CreateSolutionLevelAnalyzerReferencesForWorkspace needs to be broken out into its own service

[RikkiGibson]

https://github.com/RikkiGibson/roslyn/blob/9bcf18c556116a44c339243b22f0276f32be6d0c/src/LanguageServer/Microsoft.CodeAnalysis.LanguageServer/HostWorkspace/LanguageServerWorkspaceFactory.cs#L56-L59

Originally posted by @jasonmalinowski in #78488 (comment)