add kernel-modules-extra in overcloud image needed for HWOL

In case of ovs-hw-offload, without k-m-e installed,
it will have a performance impact because of excessive upcalls
due to the lack of act_ct.

This patch is intended to provision k-m-e in overcloud image
building.

act_ct would be added to kernel-core in rhel9.
So, k-m-e doesnt required in rhel9,centos9.

Closes-Bug: #1946227
Change-Id: If398172876059559ce70ebb868ada82da009a02d
(cherry picked from commit cd5c95441c)

image-yaml/overcloud-hardened-images-centos8.yaml

@@ -8,3 +8,5 @@ disk_images:
     elements:
       - selinux-permissive
       - interface-names
+    packages:
+      - kernel-modules-extra

image-yaml/overcloud-hardened-images-rhel8.yaml

@@ -7,3 +7,5 @@ disk_images:
       DIB_RELEASE: '8'
     elements:
       - interface-names
+    packages:
+      - kernel-modules-extra

image-yaml/overcloud-hardened-images-uefi-rhel8.yaml

@@ -7,4 +7,5 @@ disk_images:
       DIB_RELEASE: '8'
     elements:
       - interface-names
-
+    packages:
+      - kernel-modules-extra

image-yaml/overcloud-images-centos8.yaml

@@ -7,6 +7,8 @@ disk_images:
     elements:
       - selinux-permissive
       - interface-names
+    packages:
+      - kernel-modules-extra
     environment:
       FS_TYPE: xfs
     options:

image-yaml/overcloud-images-rhel8.yaml

@@ -7,6 +7,8 @@ disk_images:
     elements:
       - selinux-permissive
       - interface-names
+    packages:
+      - kernel-modules-extra
     environment:
       FS_TYPE: xfs
     options: