petsc: fix compilers listed in pkgconfig/petsc.pc (#48201)

* petsc: fix compilers listed in pkgconfig/petsc.pc

* Also fix reconfigure*.py

var/spack/repos/builtin/packages/petsc/package.py

@@ -302,7 +302,8 @@ class Petsc(Package, CudaPackage, ROCmPackage):
     # older versions of petsc did not support mumps when +int64
     conflicts("+mumps", when="@:3.12+int64")
 
-    filter_compiler_wrappers("petscvariables", relative_root="lib/petsc/conf")
+    filter_compiler_wrappers("petscvariables", "reconfigure*.py", relative_root="lib/petsc/conf")
+    filter_compiler_wrappers("petsc.pc", "PETSc.pc", relative_root="lib/pkgconfig")
 
     @run_before("configure")
     def check_fortran_compiler(self):