[sc-66697] Replace node-fetch with nodejs fetch

[akiradev]

Clients have reported that the SDK cannot be used in CommonJS projects. This is due to node-fetch@3 being an ESM only module.

With Node v18

/adzerk-management-sdk-js/lib/clientFactory.js:56
var node_fetch_1 = __importDefault(require("node-fetch"));
                                   ^

Error [ERR_REQUIRE_ESM]: require() of ES Module /adzerk-management-sdk-js/node_modules/node-fetch/src/index.js from /adzerk-management-sdk-js/lib/clientFactory.js not supported.
Instead change the require of index.js in /adzerk-management-sdk-js/lib/clientFactory.js to a dynamic import() which is available in all CommonJS modules.
    at Object.<anonymous> (/adzerk-management-sdk-js/lib/clientFactory.js:56:36)
    at Object.<anonymous> (/adzerk-management-sdk-js/lib/index.js:114:23)
    at Object.<anonymous> (/js-sdk-client/index.js:1:14) {
  code: 'ERR_REQUIRE_ESM'
}

Node.js v18.18.2

With Node v20

/adzerk-management-sdk-js/lib/clientFactory.js:56
var node_fetch_1 = __importDefault(require("node-fetch"));
                                   ^

Error [ERR_REQUIRE_ESM]: require() of ES Module /adzerk-management-sdk-js/node_modules/node-fetch/src/index.js from /adzerk-management-sdk-js/lib/clientFactory.js not supported.
Instead change the require of index.js in /adzerk-management-sdk-js/lib/clientFactory.js to a dynamic import() which is available in all CommonJS modules.
    at Object.<anonymous> (/adzerk-management-sdk-js/lib/clientFactory.js:56:36) {
  code: 'ERR_REQUIRE_ESM'
}

Node.js v20.16.0

There are workarounds suggested by the maintainers of node-fetch for use with CommonJS, however our use is minimal, therefore we can replace it with NodeJS's fetch which was made GA in v18.

Tested using https://github.com/adzerk/adzerk-management-sdk-integration-tests pointing to a local copy of the SDK.

[honeycomb-cheesecake]

👍