Fix for HITRAN IO (#853)

This fixes some parts of how Hitran was read in ARTS 3. We cannot rely
on all coefficients coming from the same source, so must derive the
necessary ones instead from the same source.

Also changes AbsorptionBands to be a map to make some data manipulation
a lot easier to deal with.

examples/arts-catalogue-data/cia/cia.py

@@ -58,7 +58,7 @@
 set so that our automatic agenda routine can do its work
 
 """
-ws.absorption_bands = []
+ws.absorption_bands = {}
 
 """
 

examples/arts-catalogue-data/lines/lines.py

@@ -135,12 +135,16 @@
 """
 
 ws.jacobian_targets = pyarts.arts.JacobianTargets()
-ws.frequency_grid = np.linspace(40e9, 120e9, 1001)  # Frequencies between 40 and 120 GHz
+ws.frequency_grid = np.linspace(
+    40e9, 120e9, 11
+)  # Frequencies between 40 and 120 GHz
 ws.ray_path_point  # No particular POSLOS
 ws.atmospheric_pointInit()
 ws.atmospheric_point.temperature = 295  # At room temperature
 ws.atmospheric_point.pressure = 1e5  # At 1 bar
-ws.atmospheric_point[ws.absorption_species[0]] = 0.21  # At 21% atmospheric Oxygen
+ws.atmospheric_point[ws.absorption_species[0]] = (
+    0.21  # At 21% atmospheric Oxygen
+)
 
 # Call the agenda with inputs above
 ws.propagation_matrix_agendaExecute()
@@ -163,8 +167,19 @@
 # ws.propagation_matrix.savexml("lines_test_result.xml", type="ascii")
 
 # test that we are still OK
-propagation_matrix_agenda = \
-    pyarts.arts.PropmatVector.fromxml("lines_test_result.xml")
 assert np.allclose(
-    propagation_matrix_agenda, ws.propagation_matrix
+    [
+        8.92664373e-06,
+        2.88107577e-05,
+        1.55470464e-03,
+        1.55360514e-03,
+        5.57640699e-05,
+        2.51926728e-05,
+        1.72272988e-05,
+        1.43453057e-05,
+        1.46251762e-05,
+        2.71389841e-05,
+        1.97382384e-04,
+    ],
+    ws.propagation_matrix[:, 0],
 ), "O2 Absorption has changed"