Changes to Upgrade project plugins

added the new trust-updated enum value to the outcomes/items/status response property for the response status 200

added the new optional request property oneOf[#/components/schemas/pkg_api_v1.upgradePluginsRequest]/public_key

added the optional property outcomes/items/trust_anchor_changed to the response with the 200 status

added the new key-signed-unverifiable enum value to the outcomes/items/reason response property for the response status 200

added the new optional request property oneOf[#/components/schemas/pkg_api_v1.upgradePluginsRequest]/allow_signer_change

endpoint added