environment variable used to configure the terraform provider content improvements

[jsundai]

Temporal Affiliation

• I am a Temporal employee

Content Suggestion

This is on correcting environment variable used to configure the terraform provider.

Here's a couple suggestions from someone who just tried to use it for the first time:
The link in the first bullet takes you to the provider's [version page] (https://registry.terraform.io/providers/temporalio/temporalcloud/latest), instead of the docs like I would expect. The third link takes you to the actual docs, but I didn't notice that until my second read-through.

Some of this page, especially the provider configuration section, could maybe be de-duped and just refer to the appropriate section of the docs on the hashi registry. The FAQ is nice because that's not something you generally get from the provider docs though.

Reference: Resources section
See related PR: #3841