Rename SqlClientTraceInstrumentationOptions.Enrich

[martincostello]

For future consideration, rename to EnrichWithFoo

Originally posted by @Kielek in #3072 (comment)

[martincostello]

Proposals for the new name?

[Kielek]

    public Action<Activity, SqlCommand>? EnrichWithSqlCommand { get; set; } // if possible without any new dependency
    public Action<Activity, object>? EnrichWithSqlCommand { get; set; } // alternative, if not possible