Rewrite global setup implementation

[sheremet-va]

Clear and concise description of the problem

Currently, the global setup is implemented as a Vite plugin which doesn't allow us to skip it when all workspace projects are skipped. This should help fix #3255.

Suggested solution

It would be nice to instead implement global setup calls as methods on a workspace project instance to call it only if there are filtered tests running:

class WorkspaceProject {
  _globalSetupCalled = false
  // called every time we run `runTests` in case new tests are added in watch mode
  initGlobalSetup() {}
  // called inside .close
  teardownGlobalSetup() {}

Alternative

No response

Additional context

No response

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