Fixes#270408
Trying to move some of the monaco related checks/tconfigs off of `moduleResolution: classic`. This legacy config is causing a lot of pain while trying to update the trusted-types typings, which is itself blocking picking up the latest dompurify
I initially tried a more scoped change but just could not get it working. So instead I ended up trying to rework our `LanguageServiceHost` to be more standard
For #270408
There are currently duplicated `LanguageServiceHost` definitions in our build folder. As far as I can tell they are the same except for the default lib name
As part of #270408 I'll have to touch the service hosts and having a single definition will make this easier
