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 46026c40dc86c78c938da66e6671ed0d792d71c9 Mon Sep 17 00:00:00 2001
From: Hood Chatham <roberthoodchatham@gmail.com>
Date: Sun, 26 Dec 2021 07:34:40 -0800
Subject: [PATCH 08/13] Rename _page_trend_test.py to prevent test unvendoring

unvendor_tests will unvendor any file that ends in _test.py.
Prevent that by changing the name of this file.
---
 scipy/stats/__init__.py                                   | 2 +-
 scipy/stats/{_page_trend_test.py => _page_trend_test_.py} | 0
 scipy/stats/meson.build                                   | 2 +-
 3 files changed, 2 insertions(+), 2 deletions(-)
 rename scipy/stats/{_page_trend_test.py => _page_trend_test_.py} (100%)

diff --git a/scipy/stats/__init__.py b/scipy/stats/__init__.py
index 70a527849..8ce1ae379 100644
--- a/scipy/stats/__init__.py
+++ b/scipy/stats/__init__.py
@@ -480,7 +480,7 @@ from ._resampling import bootstrap, monte_carlo_test, permutation_test
 from ._entropy import *
 from ._hypotests import *
 from ._rvs_sampling import rvs_ratio_uniforms, NumericalInverseHermite
-from ._page_trend_test import page_trend_test
+from ._page_trend_test_ import page_trend_test
 from ._mannwhitneyu import mannwhitneyu
 from ._fit import fit
 
diff --git a/scipy/stats/_page_trend_test.py b/scipy/stats/_page_trend_test_.py
similarity index 100%
rename from scipy/stats/_page_trend_test.py
rename to scipy/stats/_page_trend_test_.py
diff --git a/scipy/stats/meson.build b/scipy/stats/meson.build
index dfac9e073..3c5cc673f 100644
--- a/scipy/stats/meson.build
+++ b/scipy/stats/meson.build
@@ -192,7 +192,7 @@ py3.install_sources([
     '_mstats_basic.py',
     '_mstats_extras.py',
     '_multivariate.py',
-    '_page_trend_test.py',
+    '_page_trend_test_.py',
     '_qmc.py',
     '_relative_risk.py',
     '_resampling.py',
-- 
2.25.1


From 46026c40dc86c78c938da66e6671ed0d792d71c9 Mon Sep 17 00:00:00 2001
From: Hood Chatham <roberthoodchatham@gmail.com>
Date: Sun, 26 Dec 2021 07:34:40 -0800
Subject: [PATCH 08/13] Rename _page_trend_test.py to prevent test unvendoring

unvendor_tests will unvendor any file that ends in _test.py.
Prevent that by changing the name of this file.
---
 scipy/stats/__init__.py                                   | 2 +-
 scipy/stats/{_page_trend_test.py => _page_trend_test_.py} | 0
 scipy/stats/meson.build                                   | 2 +-
 3 files changed, 2 insertions(+), 2 deletions(-)
 rename scipy/stats/{_page_trend_test.py => _page_trend_test_.py} (100%)

diff --git a/scipy/stats/__init__.py b/scipy/stats/__init__.py
index 70a527849..8ce1ae379 100644
--- a/scipy/stats/__init__.py
+++ b/scipy/stats/__init__.py
@@ -480,7 +480,7 @@ from ._resampling import bootstrap, monte_carlo_test, permutation_test
 from ._entropy import *
 from ._hypotests import *
 from ._rvs_sampling import rvs_ratio_uniforms, NumericalInverseHermite
-from ._page_trend_test import page_trend_test
+from ._page_trend_test_ import page_trend_test
 from ._mannwhitneyu import mannwhitneyu
 from ._fit import fit
 
diff --git a/scipy/stats/_page_trend_test.py b/scipy/stats/_page_trend_test_.py
similarity index 100%
rename from scipy/stats/_page_trend_test.py
rename to scipy/stats/_page_trend_test_.py
diff --git a/scipy/stats/meson.build b/scipy/stats/meson.build
index dfac9e073..3c5cc673f 100644
--- a/scipy/stats/meson.build
+++ b/scipy/stats/meson.build
@@ -192,7 +192,7 @@ py3.install_sources([
     '_mstats_basic.py',
     '_mstats_extras.py',
     '_multivariate.py',
-    '_page_trend_test.py',
+    '_page_trend_test_.py',
     '_qmc.py',
     '_relative_risk.py',
     '_resampling.py',
-- 
2.25.1

