fix: VariantMapper of AssemblyMapper._norm is configurated differ…

…ently

`AssemblyMapper._norm` is a `Normalizer` object. `Normalizer` has a field `vm` of `VariantMapper` class. In the current code, when initialize an `AssemblyMapper` object with the argument set to a different value from `global_config`, the `vm` will be created using `global_config`. 

The fix passes a `VariantMapper` object initialized using the same arguments as `AssemblyMapper` object.

src/hgvs/assemblymapper.py

@@ -88,8 +88,11 @@ def __init__(
         self.in_par_assume = in_par_assume
         self._norm = None
         if self.normalize:
+            vm = VariantMapper(hdp=hdp, replace_reference=replace_reference, 
+                               prevalidation_level=prevalidation_level, 
+                               add_gene_symbol=add_gene_symbol)
             self._norm = hgvs.normalizer.Normalizer(
-                hdp, alt_aln_method=alt_aln_method, validate=False
+                hdp, alt_aln_method=alt_aln_method, validate=False, variantmapper=vm
             )
         self._assembly_map = {
             k: v for k, v in hdp.get_assembly_map(self.assembly_name).items() if k.startswith("NC_")