Improvement: DO-3034 make request() utility options argument optional, defaulting to empty object like fetch

[krzysztof-causalens]

Motivation and Context

Noticed while updating internal project, the utility is often called with empty object as second argument.

This PR makes the utility instead accept an arbitrary number of options objects which will be merged in order. This makes the argument optional.

Implementation Description

Any new dependencies Introduced

How Has This Been Tested?

PR Checklist:

• I have implemented all requirements? (see JIRA, project documentation).
• I am not affecting someone else's work, If I am, they are included as a reviewer.
• I have added relevant tests (unit, integration or regression).
• I have added comments to all the bits that are hard to follow.
• I have added/updated Documentation.
• I have updated the appropriate changelog with a line for my changes.

Screenshots (if appropriate):