Make ContainerRuntime detection less brittle

In the case of unavailable, isDocker() was throwing a NPE.

Related to #49465 (comment)

Author: gsmet

core/deployment/src/main/java/io/quarkus/deployment/pkg/steps/NativeImageBuildLocalContainerRunner.java

@@ -27,6 +27,10 @@ public NativeImageBuildLocalContainerRunner(NativeConfig nativeConfig) {
     }
 
     public static List<String> getVolumeAccessArguments(ContainerRuntime containerRuntime) {
+        if (containerRuntime.isUnavailable()) {
+            return List.of();
+        }
+
         final List<String> result = new ArrayList<>();
         if (SystemUtils.IS_OS_LINUX || SystemUtils.IS_OS_MAC) {
             if (containerRuntime.isDocker() && containerRuntime.isRootless()) {

core/deployment/src/main/java/io/quarkus/deployment/util/ContainerRuntimeUtil.java

@@ -245,7 +245,7 @@ public String getExecutableName() {
         }
 
         public boolean isDocker() {
-            return this.executableName.equals("docker");
+            return this == DOCKER || this == DOCKER_ROOTLESS || this == WSL || this == WSL_ROOTLESS;
         }
 
         public boolean isPodman() {
@@ -260,6 +260,10 @@ public boolean isRootless() {
             return rootless;
         }
 
+        public boolean isUnavailable() {
+            return this == UNAVAILABLE;
+        }
+
         public static ContainerRuntime of(String value) {
             for (ContainerRuntime containerRuntime : values()) {
                 if (containerRuntime.name().equalsIgnoreCase(value)) {