Fix UI performance issues

[BenElferink]

Performance fixes:

• Killed InstrumentationInstance watcher
• Edit InstrumentationConfig watcher - modified events to send single events
• On "modified events", fetch single entity (instead of re-fetching all)
• Moved filters into UI containers (instead of filtering on-fetch): see commit here
• Increased metrics polling interval from 3 seconds to 5 seconds

Bug fixes:

• Stop polling Describe Odigos to fix update-tokens in CLI drawer: see commit here