Bug#1141908: lintian should warn about DefaultGODEBUG in go binaries

[Nilesh Patra]

Package: lintian
Severity: wishlist

Non-module aware builds have GO111MODULE=off and hence they inject stuff
in DefaultGODEBUG options.

More context in https://lists.debian.org/debian-go/2026/07/msg00026.html