runtime(netrw): upstream snapshot of v182

runtime(netrw): upstream snapshot of v182

relevant commits:
- refactor: cleanup netrw#BrowseX
- fix: correctly handle symlinks in treeview
- chore: add minimalrc for reproducing issues
- refactor: simplify s:NetrwInit with the 'newer' assignment syntax
- refactor: remove balloon functionality
- Tune local file listing especially for Windows network drives
- interim fix for browse open with multiple windows

closes: #17616

Signed-off-by: Luca Saccarola <github.e41mv@aleeas.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>