Initialize Builtins at Native Image build time (#3821)

Moved loading of Builtin Types and Methods to a static initializer. That way the information is available at Native Image build time and one does not have to update a corresponding entry in `reflect-config` which would be a real pain when we start using it in anger.
Fixes https://www.pivotaltracker.com/story/show/183374932

CHANGELOG.md

@@ -404,6 +404,7 @@
 - [Missing foreign language generates proper Enso error][3798]
 - [Made Vector performance to be on par with Array][3811]
 - [Accept Array-like object seamlessly in builtins][3817]
+- [Initialize Builtins at Native Image build time][3821]
 
 [3227]: https://github.com/enso-org/enso/pull/3227
 [3248]: https://github.com/enso-org/enso/pull/3248
@@ -460,6 +461,7 @@
 [3798]: https://github.com/enso-org/enso/pull/3798
 [3811]: https://github.com/enso-org/enso/pull/3811
 [3817]: https://github.com/enso-org/enso/pull/3817
+[3821]: https://github.com/enso-org/enso/pull/3821
 
 # Enso 2.0.0-alpha.18 (2021-10-12)