[Flang] [OpenMP] crashes on an array in the depend clause of task directive

[k-arrows]

Reproducer:
https://godbolt.org/z/8nn9z7Ez8

subroutine foo(x)
integer :: x(3, *)
!$omp task depend(in:x(:,5))
!$omp end task
!$omp task depend(in:x(5,:))
!$omp end task
end

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With assertion-enabled flang, compiling the above reproducer results in the following assertion failure:

flang: /path_to_project/llvm-project/flang/lib/Lower/OpenMP/ClauseProcessor.cpp:969: auto Fortran::lower::omp::ClauseProcessor::processDepend(lower::SymMap &, lower::StatementContext &, mlir::omp::DependClauseOps &)::(anonymous class)::operator()(const omp::clause::Depend &, const parser::CharBlock &) const: Assertion `object.ref() && "Expecting designator"' failed.

[llvmbot]

@llvm/issue-subscribers-flang-ir

Author: None (k-arrows)

Reproducer: https://godbolt.org/z/8nn9z7Ez8 ```f90 subroutine foo(x) integer :: x(3, *) !$omp task depend(in:x(:,5)) !$omp end task !$omp task depend(in:x(5,:)) !$omp end task end ```