Switch RHEL10 back to lzma #1447
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This reverts commit c7bedf6. Currently the RHEL10 kernel does not support zstd compression for erofs, so we will use lzma by default. It can always be overridden using a config file. Related: RHEL-48606
After some experimentation these seem to be reasonable defaults: mkfs.erofs -z lzma -Ededupe,all-fragments -C 131072 --all-time ... Higher compression levels above the default of 6 don't make smaller images. The dedupe and all-fragment options, while they make it run slower, result in a smaller image size (about 75MB smaller), and --all-time reduces it by about another megabyte. These can always be overridden by creating a config file like this: [compression.erofs] type = lzma args = -C 131072 and passing it to lorax with the '--config PATH' argument. Related: RHEL-48606
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