[question] Conan 2 lockfiles: How-to lock pkgid and prev?

Dear Conan team,

earlier with Conan 1 a lockfile contained the full reference incl. pkgid and prev.

With Conan 2.0.x this information is not anymore in the lockfile by default. But you provided a parameter "--lockfile-packages" which brought back this information.

Now with newer Conan versions (tried 2.4.1 and 2.6.0) this parameter is gone from the documentation, but can be still given on the command line, but giving an (non-breaking) error, e.g.:
```
conan lock create --requires="mypkg/1.0.0" --lockfile-packages
ERROR: The --lockfile-packages arg is private and shouldn't be used
...
```

What is the correct way to get a full lockfile incl. pkgid and prev?

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