CASMCMS-8974: Add additional information about using multi-tenancy with BOS via CURL

[jsl-hpe]

Description

This adds additional information for administrators who desire to interact with the BOS API with the curl command.

Relates to:

• CASMCMS-8974

Checklis

• [x] If I added any command snippets, the steps they belong to follow the prompt conventions (see [example][1]).
• [x] If I added a new directory, I also updated .github/CODEOWNERS with the corresponding team in [Cray-HPE][2].
• [x] My commits or Pull-Request Title contain my JIRA information, or I do not have a JIRA.