Make string globals persist-able using fixed size allocations (#5296)

Co-authored-by: Daniel Dunn <dannydunn@eternityforest.com>

esphome/cpp_generator.py

@@ -663,7 +663,11 @@ async def process_lambda(
     :param return_type: The return type of the lambda.
     :return: The generated lambda expression.
     """
-    from esphome.components.globals import GlobalsComponent, RestoringGlobalsComponent
+    from esphome.components.globals import (
+        GlobalsComponent,
+        RestoringGlobalsComponent,
+        RestoringGlobalStringComponent,
+    )
 
     if value is None:
         return
@@ -676,6 +680,7 @@ async def process_lambda(
             and (
                 full_id.type.inherits_from(GlobalsComponent)
                 or full_id.type.inherits_from(RestoringGlobalsComponent)
+                or full_id.type.inherits_from(RestoringGlobalStringComponent)
             )
         ):
             parts[i * 3 + 1] = var.value()