[installer]: allow for minified config YAML

The regex for the `apiVersion` errored if the YAML was minified, which
is what we're using in KOTS installation job.

install/installer/pkg/config/loader.go

@@ -105,7 +105,8 @@ func Load(overrideConfig string) (cfg interface{}, version string, err error) {
 
 	// `apiVersion: vx` line is removed from config since the version dependant
 	// Config structure doesn't have that field
-	apiVersionRegexp := regexp.MustCompile(`apiVersion: .+\n`)
+	// The line-ending is either comma (minified YAML) or newline (unminified)
+	apiVersionRegexp := regexp.MustCompile(`apiVersion: ` + apiVersion + `(,|\n)`)
 	overrideConfig = apiVersionRegexp.ReplaceAllString(overrideConfig, "")
 
 	// Override passed configuration onto the default

install/kots/manifests/gitpod-installer-job.yaml

@@ -21,7 +21,7 @@ spec:
       containers:
         - name: installer
           # This will normally be the release tag - using this tag as need the license evaluator
-          image: 'eu.gcr.io/gitpod-core-dev/build/installer:sje-kots-helm.7'
+          image: 'eu.gcr.io/gitpod-core-dev/build/installer:sje-installer-mini-config.0'
           volumeMounts:
             - mountPath: /config-patch
               name: config-patch
@@ -171,6 +171,7 @@ spec:
               appVersion: "$(/app/installer version | yq e '.version' -)"
               EOF
 
+              echo "Gitpod: render Kubernetes manifests"
               /app/installer render -c "${CONFIG_FILE}" --namespace {{repl Namespace }} > "${GITPOD_OBJECTS}/templates/gitpod.yaml"
 
               # Workaround for #8532 and #8529