LLVM/project f6e8366flang/lib/Semantics check-declarations.cpp, flang/test/Semantics coarrays02.f90 init01.f90

[flang] Improve two coarray error messages (#129597)

Two messages that complain about local variables mention that they don't
have the SAVE attribute; in both cases, it would be okay if they were
ALLOCATABLE instead. Clarify the messages.
DeltaFile
+3-3flang/test/Semantics/coarrays02.f90
+3-2flang/lib/Semantics/check-declarations.cpp
+1-1flang/test/Semantics/init01.f90
+7-63 files

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