map classification from ssdl.access_level

[perolavsvendsen]

Lighter first step implementation of #295 based on discussions in #320

• Make fmu-dataio be strict on the content of access.ssdl.access_level ["internal", "restricted", "asset].
  • We will deprecate "asset" at some point (soon).
  • We allow for the legacy value "asset" for now, translate it to "restricted" and issue warning.
  • We raise if content is not valid (new functionality).
• Make fmu-dataio produce access.classification with the same value as access.ssdl.access_level in preparations for later deprecation of access.ssdl.access_level

[perolavsvendsen]

Discussions with SSDL - they are OK with changing from "internal"/"asset" to "internal"/"restricted" in the access.ssdl.access_level field. Possibly, we should allow both "restricted" and "asset" in a transition period, with deprecation warning on "asset".

So we possibly include:

• If "asset" is provided to access.ssdl.access_level, change it to "restricted" and issue warning.
• Then map access.classification from the updated access.ssdl.access_level

[jcrivenaes]

Seems good so far

[perolavsvendsen]

@rwiker @daniel-sol FYI

[jcrivenaes]

LGTM