Move search bar to the left

[jpipkin1]

Purpose of this pull request

This pull request moves the search bar from the right to the left so that it's grouped with the rest of the navigation in the header area. This will make it easier for customers to navigate to the search bar.

Select the type of change

• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

None. Done from request in Slack.