SegyImport to provide verbose message showing byte locations used for Inline, Crossline, X, Y

When we run SegyImport independently, default byte locations are used for Inline, Crossline, X, Y value extraction from headers. USer can override the default values either by providing inline parameters or by using separate JSON file.

In case of SegY-to-oVDS converter DAG, it is expected that values are extracted from FileCollectionSegY dataset record and passed to the converter either as parameter (like above) or via separate JSON file.

The requested enhancement for SegyImport is that it can give verbose statement showing the byte locations used and source - "default", "inline parameter" or "JSON file". Bonus - to show values from the very first trace header.

I have enclosed a file showing various runs of SegyImport and VDSInfo.

VDS-utility-checks.txt

cc @Yan_Sushchynski , @Ofstad