ANW-730: Add PUI expand/collapse all config option

[brianzelip]

This PR solves ANW-730 by adding a global PUI config option for toggling on/off the "expand all information blocks" by default at the bottom of record pages.

⚠️ The expand all option has been set to true by default. ⚠️

Description

1. Add new config option to common/config/config-defaults.rb
2. Add new parameter to initialize_accordion(), clean up handle_accordion.js
3. Pass new arguments to uses of initialize_accordion()
4. Add tests

Related JIRA Ticket or GitHub Issue

ANW-730

How Has This Been Tested?

See public/spec/features/record_accordion_spec.rb

Screenshots (if appropriate):

See above

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
  • Documentation has been updated
• I have read the CONTRIBUTING document.
• I have authority to submit this code.
• I have added tests to cover my changes.
  • All new and existing tests passed.

[brianzelip]

@quoideneuf hope this is consistent with making AS config options available.

[brianzelip]

Updated tech-docs to reflect this new config option, archivesspace/tech-docs#124.

[brianzelip]

@quoideneuf This PR is now ready for review.