NVIDIA-Jetson: Drop host OS from list of requirements

[afaerber]

PR creator: Description

Drop product version requirements, since products have individual branches.
This avoids needing to update them everywhere.

Applies also to SLE15SP6, SLE_Micro_6.0, SLE_Micro_6.1, SLE16.0 branches.

PR creator: Are there any relevant issues/feature requests?

• bsc#1257270

PR reviewer: Checklist for editorial review

Apart from the usual checks, please double-check also the following:

• do any new files fulfill the naming conventions specified in https://github.com/SUSE/doc-modular/blob/main/templates/README.md?
• article title/structure title: does it have the required length and does it use sentence style capitalization?
• revhistory: is it up-to-date and does it follow the guidelines specified in https://documentation.suse.com/style/current/html/style-guide-db/sec-smartdocs.html#sec-revhistory?
• metadata: does it follow the guidelines specified in https://documentation.suse.com/style/current/html/style-guide-db/sec-smartdocs.html#sec-taglist-smartdocs?

[afaerber]

Incorporates changes previously in #655, #656 and elsewhere per-branch.