Recent addition of AWS Key Management support in commit 4302cd8b22b5
("dev-db/mariadb: Add AWS Key Mangement support (amd64).") broke sanity
of ongoing mariadb-11.8.3 stabilization. To fix this, the original pre
USE=aws-km is restored as -r2 and the current version is moved as -r3.
Related stabilization bug will be changed to -r2.
Bug: https://bugs.gentoo.org/963354
Signed-off-by: Petr Vaněk <arkamar@gentoo.org>