[ui] Filter hidden definitions tags

[benpankow]

Summary

For run tags, we identify three tag types:

• User-defined tags, which users can attach to their jobs and which flow through to runs of those jobs
• System tags, which Dagster attaches to runs, signaled by the dagster/ prefix
• Hidden tags, which do not appear in the UI, signaled by the .dagster/ prefix

For asset definition tags, we already use the dagster/ prefix as a form of "namespacing", but no asset definition tags match the run-tag notion of "system tags."
Still, it would be useful to have a set of asset definition tags we hide from the UI entirely for things like the kind system.

This PR introduces the .dagster/ prefix as a hidden tag indicator for the definition tag system. These tags are filtered out on the frontend from display.

Test Plan

Tested locally

[benpankow]

• [ui] Filter hidden definitions tags #23771 👈
• master

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[schrockn]

How does this compare so the system tags that happen on materializations? Right now we hide those from the UI by default, for example. I think the treatment should uniform between tags here and tags there.

[benpankow]

How does this compare so the system tags that happen on materializations? Right now we hide those from the UI by default, for example. I think the treatment should uniform between tags here and tags there.

Are you talking about this toggle?

As far as I can tell that's all handled on the frontend - the backend doesn't handle system tags differently with the sole exception that we don't validate them:
https://github.com/dagster-io/dagster/blob/master/python_modules/dagster/dagster/_core/definitions/events.py#L763

[schrockn]

Why don't we just do the same here for now?

[benpankow]

At second blush I'm not convinced there's a reason to thread this through tags - see #23778

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[schrockn]

I'm still not convinced we need this.

[schrockn]

queue mgmt. I'm still not sold on supporting hidden tags like this. We should discuss.