fix: Regenerate yaml, carryTrim => trimSource cleanup (#3121)

PR #2995 didn't take into account the data model storage actually does change when you change a variable name. 
Boxer yaml generation was missed in earlier PR. 

* chore: Run `generate-yaml.sh`

* chore(cpn): carryTrim -> trimSource

* fix(build): Boxer missing from `generate-yaml`

* dodgy attempt to read old carryTrim

* fix: Don't break the byte boundary + reorder

* fix(yaml): indentation for attributes that should not be output

* chore: Regenerate YAML after rebase

---------

Co-authored-by: raphaelcoeffic <raphael.coeffic@frafos.com>

radio/src/storage/yaml/yaml_tree_walker.cpp

@@ -634,9 +634,14 @@ bool YamlTreeWalker::generate(yaml_writer_func wf, void* opaque)
             }
                 
             new_elmt = false;
-            for(int i=1; i < getLevel(); i++)
-                if (!wf(opaque, "   ", 3))
-                    return false;
+
+            if (attr->type != YDT_PADDING &&
+                (attr->type != YDT_CUSTOM || attr->u._cust_attr.write)) {
+
+                for(int i=1; i < getLevel(); i++)
+                    if (!wf(opaque, "   ", 3))
+                        return false;
+            }
             
             if (!yaml_output_attr(this, data, getBitOffset(), attr, wf, opaque))
                 return false; // TODO: error handling???