test(browser): Port unhandledrejection tests to playwright

[AbhiPrasad]

ref #11084

This test ports packages/browser/test/integration/suites/onunhandledrejection.js playwright. Because of the same limitations as outlined with the on error tests #11666, I had to use calls to window.onunhandledrejection to simulate these tests instead of just using Promise.reject to test the handler.

#11678 tracks being able to fix this so we can avoid directly calling window.onunhandledrejection to test.

As onunhandledrejection.js was the last suite to use the old integration tests, I fully removed that code and the corresponding GH action workflow. I also removed the monorepo deps on karma, chai and sinon. Extremely satisfying.

[AbhiPrasad]

$ node ./scripts/verify-packages-versions.js && lerna run build:transpile,build:types,build:bundle
/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/gauge/lib/wide-truncate.js:3
var stripAnsi = require('strip-ansi')
                ^

Error [ERR_REQUIRE_ESM]: require() of ES Module /Users/abhijeetprasad/workspace/sentry-javascript/node_modules/strip-ansi/index.js from /Users/abhijeetprasad/workspace/sentry-javascript/node_modules/gauge/lib/wide-truncate.js not supported.
Instead change the require of index.js in /Users/abhijeetprasad/workspace/sentry-javascript/node_modules/gauge/lib/wide-truncate.js to a dynamic import() which is available in all CommonJS modules.
    at Object.<anonymous> (/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/gauge/lib/wide-truncate.js:3:17)
    at Object.<anonymous> (/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/gauge/lib/render-template.js:4:20)
    at Object.<anonymous> (/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/gauge/lib/plumbing.js:3:22)
    at Object.<anonymous> (/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/gauge/lib/index.js:2:16)
    at Object.<anonymous> (/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/npmlog/lib/log.js:3:13)
    at Object.<anonymous> (/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/lerna/dist/index.js:10846:31)
    at Object.<anonymous> (/Users/abhijeetprasad/workspace/sentry-javascript/node_modules/lerna/dist/cli.js:12:3) {
  code: 'ERR_REQUIRE_ESM'
}

Node.js v18.18.0

:(

[AbhiPrasad]

Fixed ESM error with an explicit resolution 91023c8

[mydea]

pretty much a rubberstamp, but all looks good to me! 🚀