[msan] Strip __interceptor_ from reports

Showing __interceptor_ as part of the function name in reports does not
make sense and is distracting.

Strip the interceptor function name before printing.

Reviewed By: dvyukov, vitalybuka

Differential Revision: https://reviews.llvm.org/D151343

GitOrigin-RevId: 5732cdc1be519eba3fe176cae2c8fea1e0ce7ea7
11 files changed