Bug#974641: lintian: classification tag for test suite

[Lucas Nussbaum <lucas@debian.org>]

Package: lintian
Version: 2.101.0
Severity: normal

Hi,

Until this change:
https://salsa.debian.org/lintian/lintian/-/commit/c81fb3dbc4425c4322c67f0f3eeb2c208e337736
it was possible to rely on 'testsuite-autopkgtest-missing' to determine
whether a package has a test suite.

That tag was marked as renamed to 'missing-tests-control' in
https://salsa.debian.org/lintian/lintian/-/commit/dfe74fead551c3e44e884aea6275a8f4e3725693,
but this is not really the case: the 'missing-tests-control' tag is
emmited in a specific error case.

Could you please reintroduce a classification tag that makes it possible
to say whether a package has a test suite? I'd like to graph this again
on https://trends.debian.net/

Thanks

Lucas