refactor: make onLoad async

[vicb]

ESBuild recommends callbacks to be async because many can run in parallel

[changeset-bot]

⚠️ No Changeset found

Latest commit: 590d433

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pnpm add https://pkg.pr.new/@opennextjs/aws@732

commit: 590d433

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	24.28%	1950 / 8028
🔵	Statements	24.28%	1950 / 8028
🔵	Functions	51.61%	112 / 217
🔵	Branches	71.34%	488 / 684

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/open-next/src/plugins/resolve.ts	0%	0%	0%	0%	1-118

Generated in workflow #950 for commit 590d433 by the Vitest Coverage Report Action

[conico974]

LGTM Thanks

[vicb]

Thanks for the review!