Loosen setuptools lower pin

[ddelange]

What this PR does / why we need it:

This PR fixes compatibility with torch==1.10.* (which implicitly depends on setuptools<=59.5.0 ref autogluon/autogluon#1786 (comment)) and so allows serving custom models trained using those torch versions.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Type of changes
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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

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1. Please confirm that if this PR changes any image versions, then that's the sole change this PR makes.

Checklist:

• Have you added unit/e2e tests that prove your fix is effective or that this feature works?
• Has code been commented, particularly in hard-to-understand areas?
• Have you made corresponding changes to the documentation?

Release note:

Fix compatibility of the python package with torch==1.10.*

[ddelange]

cc @Suresh-Nakkeran as you raised the lower pin in #2103

[ddelange]

@yuzisun all green, do you think this PR can still be included in v0.9.0-rc0?

[ddelange]

@pvaneck taking the liberty to ping you ^^

[pvaneck]

/lgtm
However, I am wondering if setuptools even needs to be specified in the requirements.txt file. Should be included with the Python distribution like pip is, right?

[ddelange]

not all distributions include it. conda does, pyenv does, homebrew does. but e.g. apt-get doesnt: making a venv from here will require the user to install setuptools separately

[ddelange]

@pvaneck anything from my side still?

[yuzisun]

/approve

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