Update node build flow dependency from node12 to node16

[adithyaj]

Describe the bug
In a similar note to #524, GitHub Actions are deprecating node12 tasks to use node16 in Summer 2023. Right now each of our pipeline runs produces a warning to make sure we update before this time.

Additional context
We use node12 when building the discovery-handler components and we need to move this node16 and test to make sure there's no breaking change.

akri/.github/actions/build-component-per-arch/action.yml

Lines 40 to 42 in ed6446a

	runs:
	using: 'node12'
	main: 'main.js'

[github-actions]

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