When `is_interp_only_mode` is set (typically by JVMTI), `SharedRuntime::get_resolved_entry` must give a c2i adapter to go back to the interpreted, but the choice of the adapter must take the calling convention into account: a C2 caller would do a scalarized call, while a C1 caller wouldn't and requires a different adapter.

The current implementation always returns `callee_method->get_c2i_entry()` which is wrong in some cases.