fix: decode url before serving static files

[CHOYSEN]

Fix #2195

[CHOYSEN]

The test relies on the following code:

vite/packages/playground/assets/__tests__/assets.spec.ts

Lines 17 to 21 in 52f7370

	test('should have no 404s', () => {
	browserLogs.forEach((msg) => {
	expect(msg).not.toMatch('404')
	})
	})

[yyx990803]

I think we should add a middleware to decode all incoming URLs before other middlewares so that we can just remove the following:

• https://github.com/vitejs/vite/blob/main/packages/vite/src/node/server/middlewares/static.ts#L40
• https://github.com/vitejs/vite/blob/main/packages/vite/src/node/server/middlewares/static.ts#L77
• https://github.com/vitejs/vite/blob/main/packages/vite/src/node/server/middlewares/transform.ts#L57