fix(types): Allow Callbacks Passed to before*/after* to Return Anything

[LuciNyan]

Description

Hey team! 👋

• Current implementation of callCleanupHooks already accepts non-function values as cleanupCallback
• Type definition currently restricts cleanupCallback to functions only
• This PR updates the type definition to allow non-function values
• No changes to the actual implementation, only type definitions are modified

async function callCleanupHooks(cleanups: HookCleanupCallback[]) {
  await Promise.all(
    cleanups.map(async (fn) => {
      if (typeof fn !== 'function') {
        return
      }
      await fn()
    }),
  )
}

Close: #6033

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