Adapt pci-irq helm chart for oslo_config

The pci-irq-affinity-agent currently uses two mechanisms to
store its configuration parameters, and this is being unified
in [1] to use only oslo_config. As the agent uses a custom
config file in a path not used by default by oslo_config,
it will be needed to pass this path as argument when running the
application, so this commit changes the helm chart to pass the
agent config file with the "--config-file" argument used by
oslo_config.

[1] https://review.opendev.org/c/starlingx/utilities/+/822540

Test Plan:
PASS: Verify that agent definition is created with the
      argument --config-file
PASS: Verify that the agent command script runs without errors
PASS: Verify that the health probe script runs without errors

Regression:
PASS: Verify that OpenStack applies successfully

Story: 2009299
Task: 44214
Change-Id: Ibd9b8c9537ccd46351a4ec511a36c273ae0536b4
Signed-off-by: Heitor Matsui <HeitorVieira.Matsui@windriver.com>

stx-openstack-helm/stx-openstack-helm/helm-charts/pci-irq-affinity-agent/templates/bin/_start.py.tpl

@@ -10,7 +10,7 @@
 Startup script for PCI IRQ Affinity Agent.
 
 Usage example:
-# python start.py
+# python start.py --config-file /etc/pci_irq_affinity/config.ini
 
 """
 

stx-openstack-helm/stx-openstack-helm/helm-charts/pci-irq-affinity-agent/templates/bin/_start.sh.tpl

@@ -7,4 +7,4 @@
 #
 
 # Script to encapsulate the starting routines
-python /tmp/start.py
+python /tmp/start.py --config-file=/etc/pci_irq_affinity/config.ini

stx-openstack-helm/stx-openstack-helm/helm-charts/pci-irq-affinity-agent/templates/daemonset.yaml

@@ -60,6 +60,7 @@ spec:
               command:
                 - python
                 - /tmp/health-probe.py
+                - --config-file=/etc/pci_irq_affinity/config.ini
             initialDelaySeconds: 30
             periodSeconds: 180
             timeoutSeconds: 165
@@ -70,6 +71,7 @@ spec:
               command:
                 - python
                 - /tmp/health-probe.py
+                - --config-file=/etc/pci_irq_affinity/config.ini
                 - --liveness-probe
             initialDelaySeconds: 60
             periodSeconds: 60