/usr/share/lintian/overrides/debsums is in debsums 2.0.51.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # That command path is in a generated config file, not in the postinst script
debsums: command-with-path-in-maintainer-script postinst:28 /usr/bin/debsums
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