CLDR-19003 Add missing unit aliases (#5077)

Author: macchiati

common/dtd/ldmlSupplemental.dtd

@@ -771,7 +771,7 @@ CLDR data files are interpreted according to the LDML specification (http://unic
 <!ATTLIST unitAlias type NMTOKEN #REQUIRED >
     <!--@MATCH:validity/short-unit/deprecated-->
 <!ATTLIST unitAlias replacement NMTOKEN #REQUIRED >
-    <!--@MATCH:regex/[A-Za-z][-A-Za-z0-9]*-->
+    <!--@MATCH:regex/[A-Za-z0-9][-A-Za-z0-9]*-->
     <!--@VALUE-->
 <!ATTLIST unitAlias reason (deprecated) #IMPLIED >
     <!--@VALUE-->

common/supplemental/units.xml

@@ -629,7 +629,8 @@ For terms of use, see http://www.unicode.org/copyright.html
             <unitAlias type="metric-ton" replacement="tonne" reason="deprecated"/>
             <unitAlias type="permillion" replacement="part-per-1e6" reason="deprecated"/>
             <unitAlias type="portion-per-1e9" replacement="part-per-1e9" reason="deprecated"/>
-            
+            <unitAlias type="portion" replacement="part" reason="deprecated"/>
+            <unitAlias type="million" replacement="1e6" reason="deprecated"/>
 
             <!-- Usage aliases -->
 

common/validity/unit.xml

@@ -258,6 +258,7 @@ For terms of use, see http://www.unicode.org/copyright.html
 			mass-metric-ton
 			length-100-kilometer
 			concentr-permillion
+			concentr-million
 			concentr-portion
 			concentr-portion-per-1e9
 		</id>

tools/cldr-code/src/main/java/org/unicode/cldr/util/DtdData.java

@@ -1687,6 +1687,7 @@ private static final class UnitOrderHolder {
                                         "concentr-portion", // deprecated
                                         "concentr-part",
                                         "concentr-permillion", // deprecated
+                                        "concentr-million", // deprecated
                                         "concentr-part-per-million", // deprecated
                                         "concentr-part-per-1e6",
                                         "concentr-percent",