CFE allows extension members for Object members #38561
Description
CFE currently allows extension members for Object members. The following tests are failing due to this:
co19_2/LanguageFeatures/Extension-methods/syntax_member_declarations_t03/01
co19_2/LanguageFeatures/Extension-methods/syntax_member_declarations_t03/02
co19_2/LanguageFeatures/Extension-methods/syntax_member_declarations_t03/03
co19_2/LanguageFeatures/Extension-methods/syntax_member_declarations_t03/04
co19_2/LanguageFeatures/Extension-methods/syntax_member_declarations_t03/05