Enhance further testcases to verify handling of OpenACC privatization level [PR90115]
As originally introduced in commit
11b8286a83289f5b54e813f14ff56d730c3f3185
"[OpenACC privatization] Largely extend diagnostics and corresponding testsuite
coverage [PR90115]".
PR middle-end/90115
gcc/testsuite/
* c-c++-common/goacc/nesting-1.c: Enhance.
* gcc.dg/goacc/nested-function-1.c: Likewise.
* gcc.dg/goacc/nested-function-2.c: Likewise.
* gfortran.dg/goacc/nested-function-1.f90: Likewise.
libgomp/
* testsuite/libgomp.oacc-fortran/routine-1.f90: Enhance.
* testsuite/libgomp.oacc-fortran/routine-2.f90: Likewise.
* testsuite/libgomp.oacc-fortran/routine-3.f90: Likewise.
* testsuite/libgomp.oacc-fortran/routine-9.f90: Likewise.