
Sample is a general term covering both basic (IP) and branch (LBR) profiles. Find and replace ambiguous uses of sample in a basic sample sense. Rename `RawBranchCount` into `RawSampleCount` reflecting its use for both kinds of profile. Rename `PF_LBR` profile type as `PF_BRANCH` reflecting non-LBR based branch profiles (non-brstack SPE, synthesized brstack ETM/PT). Follow-up to #137644. Test Plan: NFC