feat(vscode, language-server, typescript-plugin): communicate with tsserver based on request forwarding

[johnsoncodehk]

The named pipes server was introduced in 2.0 with #3908 to allow the LSP server to communicate with the typescript plugin. But since the release of 2.0 it has revealed a lot of problems.

We are switching to a more reliable method:

1. Proxy fs.readFileSync in extension client to expose tsserver processes for typescript-language-featrues.
2. The language server sends the request to the extension client, which then accesses the tsserver process and forwards it to the typescript plugin.
3. After the typescript plugin responds, the extension client sends the results to the language server.

Since the typescript plugin no longer needs to maintain a named pipes server, and the language server no longer maintains a named pipes client, this reduces a lot of complexity and improves reliability.

This introduces a breakthrough change for other IDEs that will need to implement language-server to tsserver request forwarding to get full functionality, and we will investigate the changes other IDEs will need to make before releasing 3.0.

The #5070 implementation of the push-based component info update method has been reverted, and an alternative method will be implemented in the next PR in order not to introduce performance regressions.

[pkg-pr-new]

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commit: 780d1c6