rockchip,rk322x: fix gpio,i2c group creation

[paolosabatino]

Description

As specified in PR #5967, there was a nasty mistake in rockchip and rk322x source files that were attempting to create two groups (gpio and i2c) on the building host instead of the built image. This caused the build system to crash when the groups were already present on the building host, which is totally not desiderable, and the intended feature was also broken.

After some inspection, the groups were leveraged by a couple of udev rules to allow non-root users have access to gpio and i2c resources out of the box. This PR fixes the group creation on the target built image.

Note: gpio and i2c gids starts from 900 because gids nearby 1000 are already taken by some existing services.
Note 2: this supersedes #5967 which can be closed as well.

Jira reference number AR-1935

How Has This Been Tested?

• Compile debian bookworm for rockchip family, verify the presence of groups in target image
• Compile debian bookworm for rk322x family, verify the present of groups in target image

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules