Switch to hashlib.sha256() for ansible-test (#72411)

When FIPs mode is enable on centos-8, we are not able to load md5
functions.

Signed-off-by: Paul Belanger <pabelanger@redhat.com>

changelogs/fragments/72411-fips-mode-ansible-test.yml

@@ -0,0 +1,2 @@
+minor_changes:
+  - Switch to hashlib.sha256() for ansible-test to allow for FIPs mode.

test/lib/ansible_test/_internal/executor.py

@@ -2118,7 +2118,7 @@ class EnvironmentDescription:
         if not os.path.exists(path):
             return None
 
-        file_hash = hashlib.md5()
+        file_hash = hashlib.sha256()
 
         file_hash.update(read_binary_file(path))