Further to bug report #110693, specifically a discussion with @Ivorforce in this comment, 6 classes were identified that inherit directly from Object, but that do not define GDCLASS or GDSOFTCLASS, and hence may fail static type checks as in this comment in my unit testing PR #102064.

This PR adds GDSOFTCLASS to each.

They were found using the following ripgrep command:

rg --pcre2 -n -H -o --multiline --multiline-dotall \
  '^(class\s+(\w+)\s*:\s*public\s+Object\s*\{(?:(?!GDCLASS|GDSOFTCLASS).)*?\})' \
  --glob '*.h' --glob '*.cpp' \
  --glob '!*.gen.h' --glob '!test*.h' \
  --glob '!thirdparty/**' --glob '!drivers/**' --glob '!modules/**' \
  --replace '$2'