[question] Investigate generated files when layout() method is specified (Conan v1 compat)

[jcar87]

• Conan 1.51.0
• A recipe contains a test_package/conanfile.py that uses the layout() method and the new generators
• conan create will cause multiple files to be generated next to the test package's conanfile.py.

This behaviour is different than:

• Conan 1.x without the layout() method -> everything is generated in the build subfolder
• Conan 2.x with the layout method -> everything is generated in a test_output folder