This code runs when mini-installer executes for system level installs.
The install worker is executed for new users but also runs on each upgrade.

This is the first part of the fix, helping solve brave/brave-browser#33726

The second part of the fix will be to install the services when needed (and is a bit tricky).

This also created a new interface for Development (not in upstream)

This service is not used by Brave currently, but it's in use by Chrome.
We don't want to have conflicts with the IDs.

Updated IID for elevation service in registration (in install_static)

Updates service naming logic to take channel into account

NOTE: this is only used on system installs

This method will check for Brave VPN services and if they are not
present it will install them. This will only happen if the person
is a Brave VPN customer and has credentials.

Moves the IDL file into chromium_src, patches BUILD.gn to use
chromium_src override. IDL output rebuilt at `./src` directory
using `python3 ./tools/win/update_idl.py`

Using #109 as a guide

Also includes `.gitattributes` fix which prevents differences found
w/ filecmp.cmpfiles in MIDL compilation.

An attempt to clean up layer violations

Also includes update to `GetVpnHelperServiceProfileDir`
(`brave_vpn_helper_utils.cc`) to use std::wstring to avoid additional
base::UTF8ToWide call.

- Deleted elevator patch files
- Deleted chrome/elevation_service deps from components
- Updated elevation_service BUILD.gn patches

For more info, see:
https://chromium.googlesource.com/chromium/src/+/lkgr/docs/threading_and_tasks.md#Posting-Tasks-to-a-COM-Single_Thread-Apartment-STA_Thread-Windows

This will only allow for one call at a time AND will only allow for one
successful run per browser-open. Subsequent calls to
`InstallSystemServices` will no-op.

Includes unit tests.

Paths were differing depending on if called from elevation_service.exe
or brave.exe. There was also logic with official build. This simplifies
it all.

Tested install does the removal and that buying VPN installs the
services

Matches the `*Installed` check used by VPN helper service

Method is now passed in when connection object is created in browser
process.

Updates code to use that code too (removing from the service).

This also removes installation that could happen on brave://settings/system
This settings install use-case is obsolete now because the services will be
installed once VPN is actually in use.

This use-case would only happen if the person had VPN but it was set to
IKEv2 and they did not have the services installed. For example, a user
install (not a system install).

When system service installing is in-progress, wait till it's completed
and connect again.

…util/`