fix(cheatcodes): avoid unnecessary clone in create_end when merging recorded account diffs

[phrwlk]

The recorded account diffs handling in create_end used a temporary borrow of pop()’s result and fell back to cloning the popped vector to return it to the stack. This introduces needless allocations and diverges from the ownership pattern used in call_end. The code now takes ownership of the popped vector (let Some(mut last_depth) = recorded_account_diffs_stack.pop()), performs the same updates, and either appends into the previous depth via append(&mut last_depth) or pushes last_depth back without cloning. This preserves behavior and ordering semantics while eliminating an unnecessary clone and aligning the implementation with call_end for consistency and performance.

[mattsse]

we can keep this as is