Analyzers prototyping - Detect and skip restore (evaluation and execution)

[JanKrivanek]

Context

#9627

Single build has multiple evaluation phases and extra execution phase to facilitate Restore. Running analyzers during those would be superflous - unnecessary perf burden, plus producing duplicite reports.
There might be cases where analysis during Restore is acutaly wanted - but let's skip such cases for now.

Let's somehow detect that current evaluation/execution is for Restore and defunct analyzers infra during that (or alternatively - let's detect it's for Build and enable only during that).
The detection will probably be needed in 2 places - first in the connector logger (for the analyzers getting data from BuildEventArgs) and in RequestBuilder - for analyzers getting data directly in the evaluating/executing node (this second place is not yet mounted in current analyzers prototype code - so can be skipped now).

Work in this context:

• Refactor/Unify Build and Graph OM and API #10172
• Add BuildSubmissionStartedEventArgs event #10145
• BuildCheck does not run on restore #10018