doc: documentation errors in cloud provider access

[milh0use]

Description

First commit - fixes to typos and syntax errors in documentation
Second commit - suggested extra information to help customers translate the well documented Atlas Console method of cloud integrations with the sparsely documented Terraform method.

Link to any related issue(s):

Type of change:

• Bug fix (non-breaking change which fixes an issue). Please, add the "bug" label to the PR.
• New feature (non-breaking change which adds functionality). Please, add the "enhancement" label to the PR.
• Breaking change (fix or feature that would cause existing functionality to not work as expected). Please, add the "breaking change" label to the PR.
• This change requires a documentation update
• Documentation fix/enhancement

Required Checklist:

• I have signed the MongoDB CLA
• I have read the contribution guidelines
• I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
• I have added any necessary documentation (if appropriate)
• I have run make fmt and formatted my code
• If changes include deprecations or removals, I defined an isolated PR with a relevant title as it will be used in the auto-generated changelog.

Further comments

[jwilliams-mongo]

@milh0use LGTM % some tiny tweaks

[AgustinBettati]

Just a small consideration, all other changes LGTM. Thanks!

[AgustinBettati]

LGTM

[Zuhairahmed]

This is a great catch @milh0use! LGTM on your PR and have confirmed that you have signed our contributor's agreement. Thanks again!