chore(core/protocols): improve body-len checking and awsQueryCompat for schema-serde

[kuhe]

Issue

smithy-lang/smithy-typescript#1600

Description

• use the config body length checker (differs in Node.js and browser) if available for schema serde protocols
• cleaned up some duplicated code
• awsQueryCompat support for schema-serde

Testing

CI (unreleased code)

Checklist

• [n/a] If the PR is a feature, add integration tests (*.integ.spec.ts).
• [n/a] If you wrote E2E tests, are they resilient to concurrent I/O?
• If adding new public functions, did you add the @public tag and enable doc generation on the package?

[github-actions]

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