fix(annotations): Pass chart key to annotation logic to fix creation error

[kgopal492]

SUMMARY

• Chart key previously wasn't passed to refreshAnnotationData function, so it is determined by taking the key of the first chart in list of charts in application state
• when chart is loaded from a dashboard context, there are multiple charts in the application state, so the chart key can be incorrectly generated, causing an error & preventing users to add annotations to their charts
• This change fixes the bug by passing the correct chart key to the refreshAnnotationData function

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

Tested by adding annotations to a chart loaded from dashboard.

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

[raymondtieu]

LGTM