Update for CI: (#209)

## Description

<!--- Please describe what this PR is going to change -->
Use existing image names from quay.io. remove old github actions ci
files. update mergify to not check for old ci.

## Why is this needed

<!--- Link to issue you have raised -->

Fixes: #

## How Has This Been Tested?
<!--- Please describe in detail how you tested your changes. -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->


## How are existing users impacted? What migration steps/scripts do we
need?

<!--- Fixes a bug, unblocks installation, removes a component of the
stack etc -->
<!--- Requires a DB migration script, etc. -->


## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

.github/mergify.yml

@@ -3,7 +3,6 @@ queue_rules:
     conditions:
       # Conditions to get out of the queue (= merged)
       - check-success=DCO
-      - check-success~=validation$
 
 pull_request_rules:
   - name: Automatic merge on approval

bash/kernel/kernel_default.sh

@@ -62,7 +62,7 @@ function calculate_kernel_version_default() {
 		kernel_id_to_use="${USE_KERNEL_ID}"
 	fi
 
-	kernel_oci_image="${HOOK_KERNEL_OCI_BASE}${kernel_id_to_use}:${kernel_oci_version}"
+	kernel_oci_image="${HOOK_KERNEL_OCI_BASE}:${kernel_oci_version}"
 
 	# Log the obtained version & images to stderr
 	log info "Kernel arch: ${KERNEL_ARCH} (for ARCH ${ARCH})"

build.sh

@@ -23,8 +23,8 @@ parse_command_line_arguments "${@}" # which fills the above vars & exports the k
 # From here on, no more $1 ${1} or similar. We've parsed it all into CLI_PARSED_CMDLINE_PARAMS (already exported in environment) or CLI_NON_PARAM_ARGS
 
 ### Configuration
-declare -g HOOK_KERNEL_OCI_BASE="${HOOK_KERNEL_OCI_BASE:-"quay.io/tinkerbell/kernel-"}"
-declare -g HOOK_LK_CONTAINERS_OCI_BASE="${HOOK_LK_CONTAINERS_OCI_BASE:-"quay.io/tinkerbell/linuxkit-"}"
+declare -g HOOK_KERNEL_OCI_BASE="${HOOK_KERNEL_OCI_BASE:-"quay.io/tinkerbell/hook-kernel"}"
+declare -g HOOK_LK_CONTAINERS_OCI_BASE="${HOOK_LK_CONTAINERS_OCI_BASE:-"quay.io/tinkerbell/"}"
 
 declare -g SKOPEO_IMAGE="${SKOPEO_IMAGE:-"quay.io/skopeo/stable:latest"}"