Since [1] `computer_hdd_attribute_lines` is archived instead of unlinked in
`TestSaleProductAttributeValueConfig` which leads to indeterminism in tests due
to the missing `flush`.
Indeed `flush` is necessary before `invalidate_cache` since [2] if the data
that are pending being written must be saved to the database before the cache
invalidation.
[1] which highlighted the issue was merged after v13.0, but it still makes sense
to merge the current fix in the earliest version possible.
[1] 5361706e5e
[2] 9920f20e4cclosesodoo/odoo#43483
X-original-commit: f721bfe2860293d1456770d57be7805920929ca0
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>