dcc.Dropdown: Use virtualized lists for large collections of options

[KoolADE85]

This PR virtualizes lists when rendering lists of options (using react-window library).

Also, replaced a few options.map() calls with a Set for faster lookups.

This allows the dropdown component to render huge amounts of options without any perceivable performance impact.

Fixes #3616

Contributor Checklist

• I have run the tests locally and they passed. (refer to testing section in contributing)
• I have added tests, or extended existing tests, to cover any new features or bugs fixed in this PR

optionals

• I have added entry in the CHANGELOG.md
• If this PR needs a follow-up in dash docs, community thread, I have mentioned the relevant URLS as follows
  • this GitHub #PR number updates the dash docs
  • here is the show and tell thread in Plotly Dash community

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