Problem with platform query parameter

[jlahovnik]

In the EODAG search model we have the parameters:

• platform: Optional[str] = Field(None, alias="constellation")
• platformSerialIdentifier: Optional[str] = Field(None, alias="platform")

For the stac queryables in server mode, the alias is displayed. So, if a provider has a query parameter platformSerialIdentifier for a certain product type, platform will be returned by the request collections/collections_id/queryables. However, if you try to do a search with the parameter platform, this will not work because {"platform": "S1A"} will be serialized to 2 attributes: platform and platformSerialIdentifier. Platform is not available as a query parameter for all providers, so an error will occur.