pyverbs: Adapt includes in Fedora 39

Replace Cython includes with cimports to work around a Cython 3 bug
(#5860 on the Cython GitHub) that causes the following compilation
errors:

build/pyverbs/device.c:14743:18: error: redefinition of ‘__Pyx_Enum_enum__space_ibv_event_type_to_py’
14743 | static PyObject *__Pyx_Enum_enum__space_ibv_event_type_to_py(enum ibv_event_type __pyx_v_c_val) {
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
build/pyverbs/device.c:10914:18: note: previous definition of ‘__Pyx_Enum_enum__space_ibv_event_type_to_py’ with
type ‘PyObject *(enum ibv_event_type)’ {aka ‘struct _object *(enum ibv_event_type)’}
10914 | static PyObject *__Pyx_Enum_enum__space_ibv_event_type_to_py(enum ibv_event_type __pyx_v_c_val) {
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Edward Srouji <[email protected]>

pyverbs/libibverbs.pxd

@@ -3,9 +3,10 @@
 
 #cython: language_level=3
 
-include 'libibverbs_enums.pxd'
 from libc.stdint cimport uint8_t, uint16_t, uint32_t, uint64_t
 from posix.time cimport timespec
+from pyverbs.libibverbs_enums cimport *
+
 
 cdef extern from 'infiniband/verbs.h':
 

pyverbs/librdmacm.pxd

@@ -3,9 +3,10 @@
 
 #cython: language_level=3
 
-include 'libibverbs.pxd'
-include 'librdmacm_enums.pxd'
 from libc.stdint cimport uint8_t, uint32_t
+from pyverbs.librdmacm_enums cimport *
+from pyverbs.libibverbs cimport *
+
 
 cdef extern from '<rdma/rdma_cma.h>':
 

pyverbs/providers/mlx5/libmlx5.pxd

@@ -3,13 +3,12 @@
 
 #cython: language_level=3
 
-include 'mlx5_enums.pxd'
-
 from libc.stdint cimport uint8_t, uint16_t, uint32_t, uint64_t, uintptr_t
 from posix.types cimport off_t
 from libcpp cimport bool
 cimport libc.stdio as s
 
+from pyverbs.providers.mlx5.mlx5_enums cimport *
 cimport pyverbs.libibverbs as v