Feature/mage 827 - PHP connector v4

[cammonro]

This PR updates to Algolia PHP API client version 4 alpha.

Some key changes include:

• New API namespacing
• New AlgoliaAgent
• batch API calls for both partial / full object updates and deletions
• Applied constants such as case sensitive objectID
• getObjects signature change
• safeFetch added to handle inconsistent return types in AnalyticsHelper
• Wait tasks cleanup
• Fix secured API key call and adding validUntil to prevent long lived keys
• Reworked copyRules / copySynonyms to leverage core API
• Fixed facet query rules for admin settings save

Caveats:

• AnalyticsClient v4 alpha is not yet generating proper endpoint paths. Current prefixing is incorrect per our API documentation.