change use oicd for ga to aws

[limit7412]

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Note

Medium Risk
Changes CI deployment authentication, so misconfigured OIDC/role trust could break PR deployments; otherwise the change reduces secret exposure by removing static AWS keys.

Overview
Updates the serverless-dev GitHub Actions workflow to use GitHub OIDC for AWS authentication by granting id-token: write and switching configure-aws-credentials from long-lived access keys to role-to-assume (secrets.AWS_ROLE_ARN).

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[gemini-code-assist]

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[limit7412]

該当エラーに関してメインブランチにマージされる必要があるとの情報があったので一度マージして動作確認する