Sony lens identification improvement #7281
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Looking at the metadata for various ARWs, I noticed the lens information in the metadata is correct as long as the LensSpec is not unknown. This improves the lens identification by checking the LensSpec. If it is unknown, take the lens name from the LensID. Otherwise, let Exiv2 handle the lens name.
Unknown LensSpec example: https://discuss.pixls.us/t/call-for-testing-rawtherapee-metadata-handling-with-exiv2-includes-cr3-support/36240/36
Known LensSpec example: #7278 (comment)
Closes #7278.