cpukit/posix/aio*: Added support for lio_listio()

This commit adds support for lio_listio().
psxaio05 has been added to test the new method.
To avoid code duplication, the body of aio_read and aio_write has been
moved in two helper methods. In this way i can use it also in lio_listio().

In addition to that, a limit on the number of total aio operation enqueued
has been added.

Updates rtems/programs/gsoc#29

spec/build/testsuites/psxtests/grp.yml

@@ -63,6 +63,8 @@ links:
   uid: psxaio03
 - role: build-dependency
   uid: psxaio04
+- role: build-dependency
+  uid: psxaio05
 - role: build-dependency
   uid: psxalarm01
 - role: build-dependency

spec/build/testsuites/psxtests/psxaio05.yml

@@ -0,0 +1,20 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+build-type: test-program
+cflags: []
+copyrights:
+- Copyright (C) 2024 Alessandro Nardin <ale.daluch@gmail.com>
+cppflags: []
+cxxflags: []
+enabled-by:
+- RTEMS_POSIX_API
+features: c cprogram
+includes: []
+ldflags: []
+links: []
+source:
+- testsuites/psxtests/psxaio05/init.c
+stlib: []
+target: testsuites/psxtests/psxaio05.exe
+type: build
+use-after: []
+use-before: []