[flang][OpenMP] Add %flang_fc1 RUN to delayed privatization tests (#84296)

I did not know how `-mmlir` flag works and was deferring the addition of
`--openm-enabled-delayed-privatization` until later because I thought
some work needs to be done to do that. This commit just adds some extra
`RUN` lines to delayed privatization tests to run them from `flang` as
well.

Author: ergawy

flang/test/Lower/OpenMP/FIR/delayed-privatization-firstprivate.f90

@@ -1,6 +1,9 @@
 ! Test delayed privatization for the `private` clause.
 
-! RUN: bbc -emit-fir -hlfir=false -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-fir -flang-deprecated-no-hlfir -fopenmp -mmlir \
+! RUN:   --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: bbc -emit-fir -hlfir=false -fopenmp --openmp-enable-delayed-privatization \
+! RUN:   -o - %s 2>&1 | FileCheck %s
 
 subroutine delayed_privatization_firstprivate
   implicit none

flang/test/Lower/OpenMP/FIR/delayed-privatization-private.f90

@@ -1,6 +1,9 @@
 ! Test delayed privatization for the `private` clause.
 
-! RUN: bbc -emit-fir -hlfir=false -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-fir -flang-deprecated-no-hlfir -fopenmp -mmlir \
+! RUN:   --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: bbc -emit-fir -hlfir=false -fopenmp --openmp-enable-delayed-privatization \
+! RUN:   -o - %s 2>&1 | FileCheck %s
 
 subroutine delayed_privatization_private
   implicit none

flang/test/Lower/OpenMP/delayed-privatization-firstprivate.f90

@@ -1,6 +1,9 @@
 ! Test delayed privatization for the `firstprivate` clause.
 
-! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-hlfir -fopenmp -mmlir --openmp-enable-delayed-privatization \
+! RUN:   -o - %s 2>&1 | FileCheck %s
+! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 \
+! RUN:   | FileCheck %s
 
 subroutine delayed_privatization_firstprivate
   implicit none

flang/test/Lower/OpenMP/delayed-privatization-private-firstprivate.f90

@@ -1,6 +1,9 @@
 ! Test delayed privatization for both `private` and `firstprivate` clauses.
 
-! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-hlfir -fopenmp -mmlir --openmp-enable-delayed-privatization \
+! RUN:   -o - %s 2>&1 | FileCheck %s
+! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 \
+! RUN:   | FileCheck %s
 
 subroutine delayed_privatization_private_firstprivate
   implicit none

flang/test/Lower/OpenMP/delayed-privatization-private.f90

@@ -1,6 +1,9 @@
 ! Test delayed privatization for the `private` clause.
 
-! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-hlfir -fopenmp -mmlir --openmp-enable-delayed-privatization \
+! RUN:   -o - %s 2>&1 | FileCheck %s
+! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 \
+! RUN:   | FileCheck %s
 
 subroutine delayed_privatization_private
   implicit none

flang/test/Lower/OpenMP/delayed-privatization-reduction.f90

@@ -3,7 +3,10 @@
 ! that the block arguments are added in the proper order (reductions first and
 ! then delayed privatization.
 
-! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -emit-hlfir -fopenmp -mmlir --openmp-enable-delayed-privatization \
+! RUN:   -o - %s 2>&1 | FileCheck %s
+! RUN: bbc -emit-hlfir -fopenmp --openmp-enable-delayed-privatization -o - %s 2>&1 \
+! RUN:   | FileCheck %s
 
 subroutine red_and_delayed_private
     integer :: red