model.base: `MultiLanguageNameType` limits values to 64 instead of 128

[thammel]

MultiLanguageNameType constrains each of its values to a maximum length
of 64 characters by using check_short_name_type (ShortNameType).

• Expected behavior: Each value of a MultiLanguageNameType should be
  allowed up to 128 characters. In the AAS Part 1 Metamodel, the values of
  MultiLanguageNameType are of type LangStringNameType, whose text
  property has a maximum length of 128 characters (identical to NameType).
  This has been the case since Metamodel V3.0, and the SDK currently targets
  V3.1.2.

• Actual behavior: A value with a length between 65 and 128 characters is
  rejected with a ValueError, e.g.:
  MultiLanguageNameType has a maximum length of 64! (length: 65).
  The SDK uses check_short_name_type (max length 64) instead of
  check_name_type (max length 128).

Suggested fix: have MultiLanguageNameType use check_name_type. The
check_short_name_type and constrain_short_name_type helpers become unused
and can be removed.

Reference: https://industrialdigitaltwin.io/aas-specifications/IDTA-01001/v3.1.2/index.html

[s-heppner]

I verfied, this is a bug in our SDK.