[ClangOffloadBundler] Add file size to header (#88827)

__hipRegisterFatBinary only accepts one pointer argument. It is expected
to get the fat binary size from the header.

This patch adds a file size field to the header of the compressed
bundle.

GitOrigin-RevId: 78dca4af5a9fd77972f80e9f1ff33a00b95f669e
4 files changed