Merge pyodide_py into python_stdlib.zip. ### Description

Merges pyodide_py.tar into python_stdlib.zip. This reduces the number of network requests during the initialization.

The original intention of splitting pyodide_py.tar from pyodide.asm.data was to give users an option to provide custom files (#2023), which is now available by modifying python_stdlib.zip directly. So I think there is no reason to have both python_stdlib.zip and pyodide_py.tar.

### Checklists

- [x] Add a [CHANGELOG](https://github.com/pyodide/pyodide/blob/main/docs/project/changelog.md) entry
- [x] Add / update tests

From fa75e976ebae6fe637dbeb8294e8380aeb0ed02a Mon Sep 17 00:00:00 2001
From: Qijia Liu <liumeo@pku.edu.cn>
Date: Thu, 4 Aug 2022 20:13:04 -0400
Subject: [PATCH] Hardcode magic.mgc location

---
 src/magic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/magic.c b/src/magic.c
index 7768497a..3a004fd4 100644
--- a/src/magic.c
+++ b/src/magic.c
@@ -174,6 +174,7 @@ DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
 private const char *
 get_default_magic(void)
 {
+	return "/usr/lib/magic.mgc";
 	static const char hmagic[] = "/.magic/magic.mgc";
 	static char *default_magic;
 	char *home, *hmagicpath;
-- 
2.34.1


From fa75e976ebae6fe637dbeb8294e8380aeb0ed02a Mon Sep 17 00:00:00 2001
From: Qijia Liu <liumeo@pku.edu.cn>
Date: Thu, 4 Aug 2022 20:13:04 -0400
Subject: [PATCH] Hardcode magic.mgc location

---
 src/magic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/magic.c b/src/magic.c
index 7768497a..3a004fd4 100644
--- a/src/magic.c
+++ b/src/magic.c
@@ -174,6 +174,7 @@ DllMain(HINSTANCE hinstDLL, DWORD fdwReason,
 private const char *
 get_default_magic(void)
 {
+	return "/usr/lib/magic.mgc";
 	static const char hmagic[] = "/.magic/magic.mgc";
 	static char *default_magic;
 	char *home, *hmagicpath;
-- 
2.34.1

