feat: add boolean parameter to withUnwrapRawOverride

Callers sometimes need to temporarily set the unwrap raw override to
false (not just true). Adding a parameter avoids forcing callers to
work around the API by manually managing set/restore.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: jasmith-hs

src/main/java/com/hubspot/jinjava/interpret/Context.java

@@ -887,11 +887,15 @@ public void setUnwrapRawOverride(boolean unwrapRawOverride) {
   }
 
   public TemporaryValueClosable<Boolean> withUnwrapRawOverride() {
+    return withUnwrapRawOverride(true);
+  }
+
+  public TemporaryValueClosable<Boolean> withUnwrapRawOverride(boolean value) {
     TemporaryValueClosable<Boolean> temporaryValueClosable = new TemporaryValueClosable<>(
       isUnwrapRawOverride(),
       this::setUnwrapRawOverride
     );
-    setUnwrapRawOverride(true);
+    setUnwrapRawOverride(value);
     return temporaryValueClosable;
   }