roachtest: added hibernate ignorelist for 21.1

[mnovelodou]

Previously, some random issues with hibernate were afecting roachtest
This was inadequate because they are false failures
To address this, this patch set these tests in ignore list

Release note: none

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[cockroach-teamcity]

This change is 

[rafiss]

thank you!

bors r+

[craig]

Build succeeded:

• GitHub CI (Cockroach)