Move requests package from separate group into install_requires

[BrianJKoopman]

Description

This PR moves the requests package into the main dependency list.

Motivation and Context

requests is used by four agents now, so I think it makes sense to include in the main dependency group. Also, it was only listed as a requirement for the SynaccessAgent, which missed out on several other agents.

How Has This Been Tested?

In a fresh virtual environment:

$ pip install .
$ pip freeze
attrs==23.1.0
autobahn==23.6.2
Automat==22.10.0
cbor2==5.5.1
certifi==2023.11.17
cffi==1.16.0
charset-normalizer==3.3.2
constantly==23.10.4
cryptography==41.0.7
deprecation==2.1.0
flatbuffers==23.5.26
greenlet==3.0.2
hyperlink==21.0.0
idna==3.6
incremental==22.10.0
influxdb==5.3.1
msgpack==1.0.7
numpy==1.26.2
ocs==0.10.3
packaging==23.2
ply==3.11
py-ubjson==0.16.1
pyasn1==0.4.8
pycparser==2.21
pycryptodomex==3.19.0
pyModbusTCP==0.2.1
pyserial==3.5
pysmi==0.3.4
pysnmp==4.4.12
python-dateutil==2.8.2
pytz==2023.3.post1
PyYAML==6.0.1
requests==2.31.0
setproctitle==1.3.3
six==1.16.0
-e git+ssh://git@github.com/simonsobs/socs.git@9caa5eb8ff0ddb1e77bbad5a1fc6d939eca91854#egg=socs
SQLAlchemy==2.0.23
Twisted==23.10.0
txaio==23.1.1
typing_extensions==4.9.0
ujson==5.9.0
urllib3==2.1.0
zope.interface==6.1

Types of changes

• 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)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.