fix: show_filters URL parameter is not working

[hexcafe]

SUMMARY

Problem:
When embedding the dashboard, the filter panel does not hide even when show_filters is set to false.
After a quick investigation, I found that this parameter is not being handled at all.

Expected Behavior:

• By default, the filter panel will be shown.
• The filter panel should be hidden if the show_filters parameter is explicitly set to false or 0.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

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