Provide a reliable AdoptOpenJDK Registry Key for Windows

Add a reliable registry key to find (so we can 'prefer' AdoptOpenJDK) on Windows.

FYI - When you run one of CL our windows installers there is a checkbox to say use Oracle registry keys (since a lot of software relies on that). I think we should write an equivalent reliable AdoptOpenJDK key if you don't select Oracle (or write one regardless of whether you do or not).

So far the only semi-reliable key we’ve found is:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AdoptOpenJDK.jarfile\shell\open\command
1h
Tres Finocchiaro This points to:
@="\"C:\\Program Files\\AdoptOpenJDK\\jdk-11.0.4.11-hotspot\\bin\\javaw.exe\" -jar \"%1\" %*"
Which can then be exploded into parts that would allude to the JDK home.

There are other keys that are registered at install time but contain hard-coded version information into the paths, making them hard to reliably locate. (edited)