tests belong in specific packages

Author: c-cube

tests/core/dune

@@ -2,6 +2,7 @@
  (name t)
  (flags :standard -strict-sequence -warn-error -a+8 -open CCShims_)
  (modes native)
+ (package containers)
  (preprocess
   (action
    (run %{project_root}/src/core/cpp/cpp.exe %{input-file})))

tests/data/dune

@@ -2,4 +2,5 @@
  (name t)
  (flags :standard -strict-sequence -warn-error -a+8 -open CCShims_)
  (modes native)
+ (package containers-data)
  (libraries containers containers-data containers_testlib iter gen))

tests/thread/dune

@@ -2,4 +2,5 @@
  (name t)
  (flags :standard -strict-sequence -warn-error -a+8 -open CCShims_)
  (modes native)
+ (package containers-thread)
  (libraries containers containers-thread containers_testlib iter threads))