[llvm] [memprof] Move IndexedMemProfReader::deserialize to IndexedemProfData.cpp (NFC) (PR #137089)

[Kazu Hirata via llvm-commits]

kazutakahirata wrote:

> lgtm but there is a typo in the description (IndexedemProfData)

Thank you for spotting it!  Fixed.

https://github.com/llvm/llvm-project/pull/137089