[Build] Remove Zepto dependency

[unlikelyzero]

Summary

We have some vestigial organs related to "Zepto" throughout openmct.

• Remove references to Zepto
• Remove exports-loader from dependencies

[akhenry]

In what time frame is this needed? Almost all current usage of zepto is in legacy or deprecated code that will be going away over the next few months anyway.

Here's where we're using it right now -

• A bunch of usage under /platform as a more performant alternative to Angular's $ function (which was a stripped down JQuery analog). This will all go away when we drop Angular and our legacy codebase.
• Summary Widgets. These have been deprecated and replaced with Condition Sets + Condition Widgets. Summary Widgets will be removed completely in the coming months.
• This just leaves some usage in indicators, and the Autoflow tabular plugin, which we should replace with native API calls.

I'll create an issue to address any non-legacy usage so we can get started on that immediately.

[unlikelyzero]

@akhenry my initial concern was that exports-loader is incredibly out of date. I don't think there's any sort of clear need for this before Build 7.

[akhenry]

OK, understood, thanks.

[akhenry]

Closed by https://github.com/nasa/openmct/pull/5159/files