Remove .ci directory (#2345)

Author: pquentin

.buildkite/functions/cleanup.sh

@@ -2,7 +2,7 @@
 #
 # Shared cleanup routines between different steps
 #
-# Please source .ci/functions/imports.sh as a whole not just this file
+# Please source .buildkite/functions/imports.sh as a whole not just this file
 #
 # Version 1.0.0
 # - Initial version after refactor

.buildkite/functions/wait-for-container.sh

@@ -2,7 +2,7 @@
 #
 # Exposes a routine scripts can call to wait for a container if that container set up a health command
 #
-# Please source .ci/functions/imports.sh as a whole not just this file
+# Please source .buildkite/functions/imports.sh as a whole not just this file
 #
 # Version 1.0.1
 # - Initial version after refactor

.buildkite/pipeline.yml

@@ -5,7 +5,7 @@ steps:
     env:
       PYTHON_VERSION: "{{ matrix.python }}"
       TEST_SUITE: "platinum"
-      STACK_VERSION: 8.10.0-SNAPSHOT
+      STACK_VERSION: "8.11.0-SNAPSHOT"
       PYTHON_CONNECTION_CLASS: "{{ matrix.connection }}"
     matrix:
       setup: