feat: add mparticle to launcher integration name

[crisryantan]

Summary

I've improved the version referencing in the mParticle-Rokt integration by:

1. Adding the @rollup/plugin-replace plugin to properly inject the package version at build time
2. Updated the rollup configuration to get actual version from package.json
3. Modified the string concatenation syntax in initialization.js

These changes ensure that the integration properly identifies itself with its version number when creating the Rokt launcher, allowing for better tracking and debugging of integration versions in production.

Testing Plan

This has been tested by:

1. Verifying the syntax is valid JavaScript that works in all browser environments
2. Confirming the rollup configuration correctly imports and uses the package.json version

[rmi22186]

LGTM pending confirmation of E2E testing now that's it's been rebased