Make authorizer type check from #6150 case insensitive

[zoellner]

What did you implement

Minor addition to #6150 to make authorizer type check case insensitive

How can we verify it

same as #6150

Todos

• Write and run all tests N/A
• Write documentation N/A
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[codecov-io]

Codecov Report

Merging #7001 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #7001   +/-   ##
=======================================
  Coverage   88.45%   88.45%           
=======================================
  Files         229      229           
  Lines        8417     8417           
=======================================
  Hits         7445     7445           
  Misses        972      972

Impacted Files	Coverage Δ
...pile/events/apiGateway/lib/method/authorization.js	100% <ø> (ø)	⬆️

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[medikoo]

Thank you @zoellner !