detect nodes with missing railway=level_crossing

[mkoniecz]

variant of #9141 (detect nodes with missing highway=crossing) and #9297 (detect nodes with unneeded railway=level_crossing)

Rules:

A - node that may be left by cars in two directions. Naive check: (highway=residential or highway=unclassified or highway=primary or highway=secondary or highway=tertiary or highway=trunk (...))

B - node that may be left by railway vehicles in two directions (railway=*)

This check should find all nodes without railway=level_crossing but passing check A and check B