[uss_qualifier] Add NET0450 to existing checks

[Shastick]

As discussed with @barroco NET0450 is probably already checked for implicitly, and we need to properly mention that.

[barroco]

@BenjaminPelletier the intention is to classify the checks between NET0450 and NET0470 with the following approach:

• NET0450: Check that the observed value is acceptable compared to the value injected.
• NET0470: Check that the value respects the Common Data Dictionary definition (Table 1).
  Does it sounds reasonable to you?

[Shastick]

@barroco we had a chat with @BenjaminPelletier, his conclusion:

The text of NET0470 is:
A Net-RID Display Provider shall (NET0470) provide
access to required and optional fields defined in Table 1 to
Remote ID Display Applications.
Table 1 lists Geodetic Altitude as required, so if altitude isn't present (or doesn't match what we know it should be), yes, it seems like this requirement would be violated.

I'll update the checks to reflect that