Merge #8936 #8939

8936: fix: Improve nightly downloads with better local state management r=matklad a=SomeoneToIgnore

When any nightly is downloaded, we store its GitHub release id in the local cache and never invalidate that cache.

Due to this, it was possible to do the following sequence:
* have the nightly locally
* downgrade the extension to any stable version
* observe that despite the `"rust-analyzer.updates.channel": "nightly",` setting, no nightly updates are happening
* on the next day, the actual update happens (given the new nightly is released)

Since it's impossible to install nightly version directly through the VSCode marketplace, any fiddling with dev version results in the same situation: one have to wait for the next nightly release to happen in order to restore the nightly.

This PR 
* invalidates the cache eagerly during bootstrap if the current plugin is not nightly
* enforces the release id check for nightly versions only
* fixes the `ctx.globalStoragePath` deprecated API usage

Hopefully, it also helps mysterious non-updated plugins that we encounter from time to time, but hard to tell for sure.

8939: internal: disable debug symbols due to failing windows build r=matklad a=matklad

bors r+
🤖

Co-authored-by: Kirill Bulatov <[email protected]>
Co-authored-by: Aleksey Kladov <[email protected]>