Technically, part of this fix could go all the way back to 2.1, but since we're not sure why/how exactly the index.csv file is being corrupted in the first place, this PR should just serve as a stop-gap measure until the root cause can be identified.

A corrupted index.csv file is especially noticeable since 6.3, when the "Remove Expired Profiles" feature was added by#47352 .

RE: improves/fixes on PR#50913:
Warnings are (usually?) only escalated to errors in debug mode, so having a try/catch is a bit more overhead than I think is actually needed, and I believe just checking that the line read from the csv is not corrupted is the better/faster option. Granted, the profiler should really only be active in debug/non-production modes anyway, but "should" and reality usually don't align...

@alamirault@MatTheCat@benjaminfunk@Pelagoss@derrabus