feat(GitHub): migrate configure-aws-credentials steps to IAM role assumption

[adutchak]

Why this should be merged

This improves the security and we can get rid of using static AWS credentials

How this works

The configure-aws-credentials now assumes pre-configured IAM role

How this was tested

We successfully used this approach for another repos

still looking

[StephenButtolph]

Should we be updating these here as well?

avalanchego/.github/workflows/build-public-ami.yml

Lines 50 to 55 in 8974ed8

	- name: Configure AWS credentials
	uses: aws-actions/configure-aws-credentials@v4
	with:
	aws-access-key-id: ${{ secrets.MARKETPLACE_ID }}
	aws-secret-access-key: ${{ secrets.MARKETPLACE_KEY }}
	aws-region: us-east-1

It does use a different access key tho.. so might be intended

[adutchak]

Should we be updating these here as well?

avalanchego/.github/workflows/build-public-ami.yml

Lines 50 to 55 in 8974ed8

	- name: Configure AWS credentials
	uses: aws-actions/configure-aws-credentials@v4
	with:
	aws-access-key-id: ${{ secrets.MARKETPLACE_ID }}
	aws-secret-access-key: ${{ secrets.MARKETPLACE_KEY }}
	aws-region: us-east-1

It does use a different access key tho.. so might be intended

Updated