CMake used on a Qt6 project generates a lot of extra targets

(Possibly related to QTCREATORBUG-24718)

When I use cmake on my qt project, it now (since qt6?) adds a lot of new targets related to the main targets, for example:

HT_Simple (the normal target)
HT_Simple_autogen
HT_Simple_automoc_json_extraction
HT_Simple_other_files
HT_Simple_qmltyperegistration

It is even worse when I compile a qml module:

SQView.program
SQView.program_init
SQView_program
SQView_program_autogen
SQView_program_automoc_json_extraction
SQView_program_other_files
SQView_program_qmlcache
SQView_program_qmllint
SQView_program_qmltyperegistration
SQView_program_resources_1
SQView_program_resources_2
SQView_program_tooling

Are these targets useful for the user, except maybe the _qmllint ones?
I would like to get rid of them , or at least group them together, because the Visual Studio Solution Explorer becomes unreadable.

Thanks to this SO question, I managed to group all the _autogen targets together, but I don't know how to group or get rid of the other supererogatory targets.
The _autogen targets problem was supposed to be a bug in CMake-3.9, I don't know about our situation now.

Thank you for your help!