feat: multiorg Global Header

[ChitlangeSahas]

Closes #4051
Closes #4047

Co Authored by @wdoconnell

Multi-org epic requires a global header that includes a searchable switch account and switch org menu, which this feature implements. The 'user'-related portion of the header component will be completed alongside #4049

This feature is behind the multiOrg and quartzIdentity feature flags, and will not appear in the app unless those flags are enabled.

Screen.Recording.2022-07-01.at.12.18.54.PM.mov

To test generation of arbitrarily large collections of accounts/organizations, a mock can be commented into the file so that tests can be run without provisioning thousands of quartz orgs or accounts.

This has been tested both with mock data using remocal, as well as with non-mocked data with quartz-remocal. When using actual quartz data, the 'Settings,' 'Billing', and 'Members' buttons also redirect the user to the corresponding pages in their currently-selected account or organization.

Screen.Recording.2022-07-01.at.2.09.45.PM.mov

There may be some minor additional tweaks (e.g., removing superfluous code) once parallel changes are merged to clockface.

Checklist

Authors and Reviewer(s), please verify the following:

• A PR description, regardless of the triviality of this change, that communicates the value of this PR
• Well-formatted conventional commit messages that provide context into the change
• Documentation updated or issue created (provide link to issue/PR)
• Signed CLA (if not already signed)
• Feature flagged, if applicable

[wdoconnell]

On Tuesday, let's circle up w/ Bucky re whether he's on board with adding the random org/account generator. It's useful for demonstration purposes so that we don't have duplicate org/account names when we're testing the component for large account/org values, but maybe we don't need that many lines - that file is twice the size of the other globalheader files.

[hoorayimhelping]

Solid work, have a few suggestions here.

[hoorayimhelping]

great work!