chore(clients): call emitWarningIfUnsupportedVersion from runtimeConfig

[trivikr]

Issue

Internal JS-3236
smithy-ts PR smithy-lang/smithy-typescript#549

Description

Calls emitWarningIfVersionUnsupported from runtimeConfig

Testing

Verified that waring is emitted for Node.js <12 only once:

// test.js
const { DynamoDB } = require("../aws-sdk-js-v3/clients/client-dynamodb");
const { S3 } = require("../aws-sdk-js-v3/clients/client-s3");

const dynamodbClient = new DynamoDB();
const s3Client = new S3();

$ fnm use 10
Using Node v10.24.1

$ node test.js
(node:1352) NodeDeprecationWarning: The AWS SDK for JavaScript (v3) will
no longer support Node.js v10.24.1 as of January 1, 2022.
To continue receiving updates to AWS services, bug fixes, and security
updates please upgrade to Node.js 12.x or later.

More information can be found at: https://a.co/1l6FLnu

$ fnm use 12
Using Node v12.22.1

$ node test.js

The warning will change to include Node.js 12.x in #3636

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