Heap snapshot objects categorized by property list in curly braces

[mikehoffms]

Rendered article section for review:

• Record heap snapshots using the Memory tool > Summary view
  • https://review.learn.microsoft.com/microsoft-edge/devtools-guide-chromium/memory-problems/heap-snapshots?branch=pr-en-us-3260#summary-view
  • [Before/Live]

This PR makes the following changes:

• Updates article about heap snapshots in Memory tool's Summary view.
  • The Memory tool in DevTools shows objects as automatically categorized by interface (property list), in curly braces. Plain JavaScript objects are not listed in a category named Object, but are instead represented by names and categories that are based on the properties that the object contains, such as {foo, bar, baz}.
  • Cleaned up that Summary view section.
    • Worded to make each subsection modular / self-contained; meaningful when read in isolation.
• Deleted h2 section "Configure the Shallow Size column to include an entire object's size":
  https://learn.microsoft.com/en-us/microsoft-edge/devtools-guide-chromium/memory-problems/heap-snapshots#configure-the-shallow-size-column-to-include-an-entire-objects-size
  including its pngs.
  • Deleted mentions of that, elsewhere.

[learn-build-service-prod]

Learn Build status updates of commit fcfed3b:

✅ Validation status: passed

File	Status	Preview URL	Details
microsoft-edge/devtools-guide-chromium/memory-problems/heap-snapshots-images/customize-icon.png	✅Succeeded	n/a (file deleted or renamed)
microsoft-edge/devtools-guide-chromium/memory-problems/heap-snapshots-images/settings-icon.png	✅Succeeded	n/a (file deleted or renamed)
microsoft-edge/devtools-guide-chromium/memory-problems/heap-snapshots-images/shallow-size-entire-object.png	✅Succeeded	n/a (file deleted or renamed)
microsoft-edge/devtools-guide-chromium/memory-problems/heap-snapshots.md	✅Succeeded	View
microsoft-edge/devtools-guide-chromium/memory-problems/memory-101.md	✅Succeeded	View
microsoft-edge/devtools-guide-chromium/whats-new/2022/06/devtools-103.md	✅Succeeded	View

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[sethbrenith]

LGTM per dev review

[mikehoffms]

LGTM per Writer/Editor review after changes were made.