Prepare release 4.0.0 (#727)

* Prepare release 4.0.0

* update documentation

changelogs/fragments/20231206-fix-unsafe-condition-in-integration.yml

@@ -1,3 +0,0 @@
----
-bugfixes:
-  - avoid unsafe conditions in integration tests (https://github.com/ansible-collections/kubernetes.core/pull/665).

changelogs/fragments/20240117-fix-helm-diff-cmd-line-rendering.yml

@@ -1,4 +0,0 @@
----
-bugfixes:
-  - align `helmdiff_check()` function commandline rendering with the `deploy()` function (https://github.com/ansible-collections/kubernetes.core/pull/670).
-  - integrations test helm_kubeconfig - set helm version to v3.10.3 to avoid incompatability with new bitnami charts (https://github.com/ansible-collections/kubernetes.core/pull/670).

changelogs/fragments/20240222-Collections-util-resource-discovery-fails-when-complex-subresources-present.yml

@@ -1,3 +0,0 @@
----
-bugfixes:
-  - Resolve Collections util resource discovery fails when complex subresources present (https://github.com/ansible-collections/kubernetes.core/pull/676).

changelogs/fragments/20240228-fix-helm-diff-with-reuse-values.yml

@@ -1,3 +0,0 @@
----
-bugfixes:
-  - helm - use ``reuse-values`` when running ``helm diff`` command (https://github.com/ansible-collections/kubernetes.core/issues/680).

changelogs/fragments/20240423-k8s-display-warnings-to-users.yml

@@ -1,3 +0,0 @@
----
-minor_changes:
-  - k8s - The module and K8sService were changed so warnings returned by the K8S API are now displayed to the user.

changelogs/fragments/inventory-update_removal_date.yml

@@ -1,2 +0,0 @@
-minor_changes:
-  - inventory/k8s.py - Defer removal of k8s inventory plugin to version 5.0 (https://github.com/ansible-collections/kubernetes.core/pull/723).

changelogs/fragments/k8s-merge_type-removed.yml

@@ -1,2 +0,0 @@
-removed_features:
-  - k8s - Support for ``merge_type=json`` has been removed in version 4.0.0. Please use ``kubernetes.core.k8s_json_patch`` instead (https://github.com/ansible-collections/kubernetes.core/pull/722).

changelogs/fragments/module_utils-common-remove-deprecated-functions-and-class.yaml

@@ -1,6 +0,0 @@
-removed_features:
-  - k8s_exec - the previously deprecated ``result.return_code`` return value has been removed, consider using ``result.rc`` instead (https://github.com/ansible-collections/kubernetes.core/pull/726).
-  - module_utils/common.py - the previously deprecated ``K8sAnsibleMixin`` class has been removed (https://github.com/ansible-collections/kubernetes.core/pull/726).
-  - module_utils/common.py - the previously deprecated ``configuration_digest()`` function has been removed (https://github.com/ansible-collections/kubernetes.core/pull/726).
-  - module_utils/common.py - the previously deprecated ``get_api_client()`` function has been removed (https://github.com/ansible-collections/kubernetes.core/pull/726).
-  - module_utils/common.py - the previously deprecated ``unique_string()`` function has been removed (https://github.com/ansible-collections/kubernetes.core/pull/726).