Exclude marshalled-frozen data if deep-freezing to save 300 KB space

[kumaraditya303]

BPO	46608
Nosy	@gvanrossum, @vstinner, @ericsnowcurrently, @miss-islington, @kumaraditya303
PRs	bpo-46608: exclude marshalled-frozen data if deep-freezing to save 300 KB space  #31074 bpo-46608: Fix argument parsing in freeze_modules.py #31131

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2022-02-10.14:11:41.189>
created_at = <Date 2022-02-02.09:08:27.836>
labels = ['build', '3.11']
title = 'Exclude marshalled-frozen data if deep-freezing to save 300 KB space'
updated_at = <Date 2022-02-26.23:27:26.269>
user = 'https://github.com/kumaraditya303'

bugs.python.org fields:

activity = <Date 2022-02-26.23:27:26.269>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2022-02-10.14:11:41.189>
closer = 'kumaraditya'
components = ['Build']
creation = <Date 2022-02-02.09:08:27.836>
creator = 'kumaraditya'
dependencies = []
files = []
hgrepos = []
issue_num = 46608
keywords = ['patch']
message_count = 4.0
messages = ['412346', '412521', '412578', '414122']
nosy_count = 5.0
nosy_names = ['gvanrossum', 'vstinner', 'eric.snow', 'miss-islington', 'kumaraditya']
pr_nums = ['31074', '31131']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue46608'
versions = ['Python 3.11']

[kumaraditya303]

This reduces the size of the data segment by 300 KB of the executable because if the modules are deep-frozen then the marshalled frozen data just wastes space. This was inspired by comment by @gvanrossum in bpo-29118 (comment). Note: There is a new option --deepfreeze-only in freeze_modules.py to change this behavior, it is on be default to save disk space.

# du -s ./python before
27892 ./python
# du -s ./python after
27524 ./python

[miss-islington]

New changeset bf95ff9 by Kumar Aditya in branch 'main':
bpo-46608: exclude marshalled-frozen data if deep-freezing to save 300 KB space (GH-31074)
bf95ff9

[gvanrossum]

New changeset 9d4161a by Kumar Aditya in branch 'main':
bpo-46608: Fix argument parsing in freeze_modules.py (GH-31131)
9d4161a

[vstinner]

https://docs.python.org/dev/whatsnew/3.11.html#c-api-changes documents the addition of the "is_package" member to the _frozen structure, but it doesn't mention the new "get_code" member. Can it be also documented?