docs: add keyvault artifacts setup for testing

[aramase]

Signed-off-by: Anish Ramasekar [email protected]

Reason for Change:

• Adds instructions for keyvault setup and commands used to generate the test secret/key/certs

Requirements

• squashed commits
• included documentation
• added unit tests and e2e tests (if applicable).

Issue Fixed:

Does this change contain code from or inspired by another project?

• Yes
• No

If "Yes," did you notify that project's maintainers and provide attribution?

Special Notes for Reviewers:

[codecov-commenter]

Codecov Report

Merging #772 (779d29b) into master (99de388) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #772   +/-   ##
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  Coverage   61.65%   61.65%           
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  Files           7        7           
  Lines         785      785           
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  Hits          484      484           
  Misses        267      267           
  Partials       34       34