DLPX-88488 profile is missing stack traces

[sumedhbala-delphix]

Clean cherrypick of b2e9c36
Testing: ab-pre-push passed

Ran the following to figure out number of entries on a 4 core system
without the change:
"""
delphix@ip-10-110-214-21:/var/delphix/server/log/stats$ grep -v '^-' profile_3600.log | grep -o ' [0-9]$' | paste -s -d+ - | bc
721214
"""
721214/(6060499) = ~50% hit rate

with the change:
"""
delphix@ip-10-110-238-208:/var/delphix/server/log/stats$ grep -v '2023-11-01' profile_3600.log | grep -o ' [0-9]$' | paste -s -d+ - | bc
1237787
"""
1237787/(6060499) = ~80% hit rate

I doubled the default hash to 81920 and we got to 83% hit rate, does not seem like we gain too much with increasing the hash size.