Encrypted SoftwareUpdatable v2 artifacts support

[konstantina-gramatova]

To achieve the desired support, utilizing the metadata provided per SoftwareModule in a SoftwareUpdatabale v2 action can be done in the following manner:

• A secure enough algorithm is applied for the transferred (de)encryption data - e.g. AES-256 GCM
• The key material is made available as base 64 encoded values in the generic metadata dictionary with appropriate distinctive keys, i.e.
  • AES256.key
  • AES256.iv

E.g.:

"metaData": {
  "AES256.key": "AxS5kSOpU2BEsHotpy67nP4lndr/io4XmI9GqO/DFuo=",
  "AES256.iv": "G0kMVI5lOqqlfgTt"
}