fix: Protobuf lower bound to 3.20 to alert that Feast is incompatible with tensorflow

[gbmarc1]

What this PR does / why we need it:
protobuf in python sdk should be lower bound to 3.20 because they introduced the builder in 3.20.

feast/protos/feast/types/Value_pb2.py:5
      1 # -*- coding: utf-8 -*-
      2 # Generated by the protocol buffer compiler.  DO NOT EDIT!
      3 # source: feast/types/Value.proto
      4 """Generated protocol buffer code."""
----> 5 from google.protobuf.internal import builder as _builder
      6 from google.protobuf import descriptor as _descriptor
      7 from google.protobuf import descriptor_pool as _descriptor_pool

ImportError: cannot import name 'builder' from 'google.protobuf.internal' /lib/python3.9/site-packages/google/protobuf/internal/__init__.py)

Which issue(s) this PR fixes:

Fixes #3287

[gbmarc1]

/assign @sfc-gh-madkins

[achals]

I think you'll have to regenerate the requirements.txt files. There's a command in the makefile that you can use to do that!

[gbmarc1]

@achals Done!

[adchia]

/lgtm

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[adchia]

@cburroughs mentioned that Tensorflow requires a Protobuf version < 3.20

[cburroughs]

Hey sorry I missed the github notification for this earlier!

At least for me the original impetuous for #3287 was that tensorflow requires protobuf < 3.20. If you download the latest version on PyPi today (tensorflow==2.11.0)

    # TODO(b/182876485): Protobuf 3.20 results in linker errors on Windows
    # Protobuf 4.0 is binary incompatible with what C++ TF uses.
    # We need ~1 quarter to update properly.
    # See also: https://github.com/tensorflow/tensorflow/issues/53234
    # See also: https://github.com/protocolbuffers/protobuf/issues/9954
    # See also: https://github.com/tensorflow/tensorflow/issues/56077
    # This is a temporary patch for now, to patch previous TF releases.
    'protobuf >= 3.9.2, < 3.20',

Tensorflow is a pretty popular machine learning library and I'd like to be able to use it with Feast.

I'm not a protobuf expert but my understanding from protocolbuffers/protobuf#9778 is that if you use version X to generate the code, then it is only guaranteed to work with version >=X. So if Feast as a requirement on >=3.20 the minimum version isn't' "3.20" but "whatever version >=3.20 that happened to be resolved when the release process runs". That means a similar problem could occur in the future any time Feast cuts a release. I think a separate step (in the makefile?) will need to to pin to an explicit version.

[gbmarc1]

@cburroughs,
Actually, current Feast version is not compatible with protobuf<3.20. Installing a virtual environment with feast and tensorflow==2.11 would not raise an incompatibility error. But when importing Feast, an error would raise because there would be a missing method in protobuf.

      1 # -*- coding: utf-8 -*-
      2 # Generated by the protocol buffer compiler.  DO NOT EDIT!
      3 # source: feast/types/Value.proto
      4 """Generated protocol buffer code."""
----> 5 from google.protobuf.internal import builder as _builder
      6 from google.protobuf import descriptor as _descriptor
      7 from google.protobuf import descriptor_pool as _descriptor_pool

ImportError: cannot import name 'builder' from 'google.protobuf.internal' (/opt/miniconda/envs/env/lib/python3.9/site-packages/google/protobuf/internal/__init__.py)

Note that they updated the protobuf version in tensorflow==2.12. It is already merged on master and available on this release candiate.

[cburroughs]

Actually, current Feast version is not compatible with protobuf<3.20.

Correct! That is the regression between 0.25.0 and 0.25.1 reported in #3287

[adchia]

/lgtm

[adchia]

/lgtm