Allow objdump to be used for displaying elf sizes (#37701)

* Prepare to support objdump for symbols

* Ignore offset, have the path computed by the parser

* Fix unused variables

* Parsing somewhat works ...

* Update code a bit, will work on this later

* Display works

* Display works

* Restyle

* more redable separators

* more support for better filtering

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Co-authored-by: Andrei Litvin <andreilitvin@google.com>

Author: andy31415