Added merge environmental settings to prepared request

[Gabefire]

Description

• User mentions they are wanting to use self-signed SSL certs for the SDK but unable to do so since our SDK does not take account of the environmental variable REQUESTS_CA_BUNDLE
• reference these docs for more details
• But I essentially implemented the recommended solution

[vbrodsky]

I do not believe we should be using prepare_request on the Session itself... unfortunately so. This is because we are modifying headers above and if you use prepare_request on the session it will prb merge those headers back.

[Gabefire]

So just to test I printed out both the request headers and prepped headers

{
    "User-Agent": "python-requests/2.32.3",
    "Accept-Encoding": "gzip, deflate",
    "Accept": "application/json",
    "Connection": "keep-alive",
    "Authorization": "Bearer <API_KEY>",
    "Content-Type": "application/json",
    "X-User-Agent": "python-sdk 4.0.0",
    "X-Python-Version": "3.8.18-final",
}
{
    "User-Agent": "python-requests/2.32.3",
    "Accept-Encoding": "gzip, deflate",
    "Accept": "application/json",
    "Connection": "keep-alive",
    "Authorization": "Bearer <API_KEY>",
    "Content-Type": "application/json",
    "X-User-Agent": "python-sdk 4.0.0",
    "X-Python-Version": "3.8.18-final",
    "Content-Length": "733",
}

[Gabefire]

Ahh I see what your saying. I modified it to add the correct headers to the prepped response. I believe that is what the docs recommended to allow the merge_environment_settings

[Gabefire]

Moved this back to just prepped but did the merge setting still

[vbrodsky]

@Gabefire we really need to confirm this via testing... how can we do that?