eth-bytecode-db: sourcify lookup returns invalid file names when "path-translation.json"

[rimrakhimov]

For contracts that have a path-translation.json in Sourcify repository (example), Sourcify lookup returns not translated source file names. At the same time, fileName returned is already translated (as it is taken unprocessed from metadata.json compilationTarget).

That results in fileName that does not exist inside sourceFiles which is a response blockscout cannot process (see "LookUpSmartContractSourcesOnDemand terminating" in error logs)