investigate and fix potential goroutines leak within explorer

[enekofb]

Investigating memory usage increase for wge #3189

We have found that when enabled explorer we have a likely leak of goroutines as we see an ever-increasing number of goroutines

#3189 (comment)

However when explorer is disabled the number of goroutines remains stable

#3189 (comment)

AC

• verify this finding
• in case of leak, address it

[jpellizzari]

Let's try turning off the ObjectCleaner and see what this graph looks llike