Allow trusting custom integration fingerprints

[blt04]

This adds three new ImportAsset attributes to allow custom integrations to specify that their fingerprint data should be trusted, even if the data cannot be normalized by runZero's fingerprint engine:

• trust_os - Trusts the os attribute and use it to set Asset OS
• trust_os_version - Trusts the os_version attribute and use it to set Asset OS
• trust_device_type - Trusts the device_type attribute and use to to set Asset Type

Without these options set, os, os_version and device_type will only be used to set the runZero asset fingerprint if they can be normalized via runZero's fingerprint engine. os, os_version and device_type are always available under the custom integrations attributes, even when the corresponding trust_* options are not set.

Example:

asset = ImportAsset(
  id=f"test-asset-{i}",
  hostnames=[f"test-asset-{i}"],
  device_type="Custom Type",
  os="Custom OS",
  os_version="0.1.2",
  trust_device_type=True,
  trust_os=True,
  trust_os_version=True,
)