Asset View Improvements

Summary:
This diff addresses a bunch of usability concerns with the asset detail page and adds some new features:

• Event oriented lists / tables instead of run-oriented. Partition / execution time columns show the materialization data not the run data
• Single strip of green boxes is replaced by a grid showing materialization events over time / partition with rows showing each metadata entry
• Separate graphs for each numerical metadata entry that have synchronized hover states
• Ability to toggle graphs on and off
• Graphs no longer interpret ISO partition names (eg: 2020-04-01) as dates - the exact partition strings are displayed on the X axis
• Improved linking to runs (goes directly to metadata event in the logs)

Loom walkthrough!
https://www.loom.com/share/0afedc3ffc0a45479ba6a8e9ae34d0e7

Test Plan: Evaluate new design, try with assets outside core examples repo

Reviewers: dish, prha, schrockn, sandyryza

Reviewed By: dish

Subscribers: max

Differential Revision: https://dagster.phacility.com/D5147