[flang] Diagnose known out-of-range subscripts in more circumstances

[flang] Diagnose known out-of-range subscripts in more circumstances

Semantics can catch out-of-range subscript values already when they
appear in DATA statement objects and constant folding of name constant
array indexing; this patch fills the gap by checking known constant
subscript values in other contexts.

Differential Revision: https://reviews.llvm.org/D142764