lakeFS api test runs with >40 GiB of virtual memory, >6 GiB of which is resident

[arielshaqed]

Sample line from top output:

1167665 ariels    20   0   41.9g   5.7g  99088 S 103.6  18.4   3:15.35 api.test                

So it runs slower than it could, so devs run it less often.

Use pprof tools (available on Go testing, see "profile" flags available here) to see what allocates and/or leaks so much memory... and fix it.