Support YAML oslo policy file in software

The usage of JSON oslo policy files was deprecated in Victoria [1]. This
change converts the current policy files and their references to YAML.

The policy file was converted to YAML, using the tool provided by oslo
('oslopolicy-convert-json-to-yaml').

[1] https://docs.openstack.org/releasenotes/oslo.policy/victoria.html

Test Plan:
PASS: Deploy AIO-SX (over master branch).
      Check that the YAML files are present.
PASS: Check the YAML rules using the oslo tool 'oslopolicy-checker'.
PASS: Run 'software list' and 'software show starlingx-26.03.0'.

Story: 2011360
Task: 53168

Change-Id: Ic7e5f7cffc39c0f8ba0a9acb5230cd0951272d96
Signed-off-by: Marcelo de Castro Loebens <Marcelo.DeCastroLoebens@windriver.com>

software/debian/deb_folder/rules

@@ -49,8 +49,8 @@ override_dh_install:
 		${ROOT}/etc/init.d/reset-boot-counter
 	install -m 600 service-files/software.conf \
 		${ROOT}/etc/software/software.conf
-	install -m 644 service-files/policy.json \
+	install -m 644 service-files/policy.yaml \
-		${ROOT}/etc/software/policy.json
+		${ROOT}/etc/software/policy.yaml
 	install -m 444 service-files/pmon-software-controller-daemon.conf \
 		${PMONDIR}/software-controller-daemon.conf
 	install -m 444 service-files/pmon-software-agent.conf \

software/service-files/policy.json

@@ -1,2 +0,0 @@
-{
-}