mgr/cephadm: reformat the _service_classes variable

Reformat the _service_classes variable so that it uses a multi-line list
with a single item on each line in a more black-ish style that is more
readable (especially if you use code-folding wisely).
Sort the list while we're at it.

Signed-off-by: John Mulligan <jmulligan@redhat.com>

src/pybind/mgr/cephadm/module.py

@@ -661,12 +661,33 @@ def __init__(self, *args: Any, **kwargs: Any):
         self.migration = Migrations(self)
 
         _service_classes: Sequence[Type[CephadmService]] = [
-            OSDService, NFSService, MonService, MgrService, MdsService,
-            RgwService, RbdMirrorService, GrafanaService, AlertmanagerService,
-            PrometheusService, NodeExporterService, LokiService, PromtailService, CrashService, IscsiService,
-            IngressService, CustomContainerService, CephfsMirrorService, NvmeofService,
-            CephadmAgent, CephExporterService, SNMPGatewayService, ElasticSearchService,
-            JaegerQueryService, JaegerAgentService, JaegerCollectorService, NodeProxy
+            AlertmanagerService,
+            CephExporterService,
+            CephadmAgent,
+            CephfsMirrorService,
+            CrashService,
+            CustomContainerService,
+            ElasticSearchService,
+            GrafanaService,
+            IngressService,
+            IscsiService,
+            JaegerAgentService,
+            JaegerCollectorService,
+            JaegerQueryService,
+            LokiService,
+            MdsService,
+            MgrService,
+            MonService,
+            NFSService,
+            NodeExporterService,
+            NodeProxy,
+            NvmeofService,
+            OSDService,
+            PrometheusService,
+            PromtailService,
+            RbdMirrorService,
+            RgwService,
+            SNMPGatewayService,
         ]
 
         # https://github.com/python/mypy/issues/8993