manager: add needs-stop/needs-start (#40709)

Intend to use these in the deb packaging scriptlets

Fixes: #19755

src/basic/unit-def.c

@@ -155,6 +155,8 @@ FreezerState freezer_state_objective(FreezerState state) {
 static const char* const unit_marker_table[_UNIT_MARKER_MAX] = {
         [UNIT_MARKER_NEEDS_RELOAD]  = "needs-reload",
         [UNIT_MARKER_NEEDS_RESTART] = "needs-restart",
+        [UNIT_MARKER_NEEDS_STOP]    = "needs-stop",
+        [UNIT_MARKER_NEEDS_START]   = "needs-start",
 };
 
 DEFINE_STRING_TABLE_LOOKUP(unit_marker, UnitMarker);

src/basic/unit-def.h

@@ -62,6 +62,8 @@ typedef enum FreezerState {
 typedef enum UnitMarker {
         UNIT_MARKER_NEEDS_RELOAD,
         UNIT_MARKER_NEEDS_RESTART,
+        UNIT_MARKER_NEEDS_STOP,
+        UNIT_MARKER_NEEDS_START,
         _UNIT_MARKER_MAX,
         _UNIT_MARKER_INVALID = -EINVAL,
 } UnitMarker;