[lldb] NFC remove DISALLOW_COPY_AND_ASSIGN

Summary:
This is how I applied my clang-tidy check (see
https://reviews.llvm.org/D80531) in order to remove
`DISALLOW_COPY_AND_ASSIGN` and have deleted copy ctors and deleted
assignment operators instead.

```
lang=bash
grep DISALLOW_COPY_AND_ASSIGN /opt/notnfs/kkleine/llvm/lldb -r -l | sort | uniq > files

for i in $(cat files);
do
  clang-tidy \
    --checks="-*,modernize-replace-disallow-copy-and-assign-macro" \
    --format-style=LLVM \
    --header-filter=.* \
    --fix \
    -fix-errors \
    $i;
done
```

Reviewers: espindola, labath, aprantl, teemperor

Reviewed By: labath, aprantl, teemperor

Subscribers: teemperor, aprantl, labath, emaste, sbc100, aheejin, MaskRay, arphaman, usaxena95, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D80543

lldb/source/Plugins/ScriptInterpreter/Python/PythonDataObjects.h

@@ -90,7 +90,9 @@ public:
   void Serialize(llvm::json::OStream &s) const override;
 
 private:
-  DISALLOW_COPY_AND_ASSIGN(StructuredPythonObject);
+  StructuredPythonObject(const StructuredPythonObject &) = delete;
+  const StructuredPythonObject &
+  operator=(const StructuredPythonObject &) = delete;
 };
 
 enum class PyObjectType {