Use CLDR's time zone mappings for Windows

On Windows, currently the Windows zone names to Java TZs are hard-coded in lib/tzmappings file. This is error prone and needs manual maintenance.

There is the same mapping maintained by CLDR, supplement/windowsZones.xml which we can use as the source of win->java zone id mappings. This feature intends to replace the hard-coded tzmappings file with dynamically generated data from CLDR.