SRV-795 feat - reading language from url

[nyohasstium]

SUMMARY

fix(embedded dashboard): resource type was not checked appropriately against enum.
feat(UI): added currency and language to URL_PARAMS
feat(API): using language based on query parameter if found and defaulting to session value

TESTING INSTRUCTIONS

• Embed a dashboard using the superset-embedded-sdk package.
• Set lang and currency in the urlParams options.
• Depending on the chosen language, the ui will be rendered with it.

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[davidriverapericas]

Demo'ed & Approved