Deprecation of CI_JWT_V1 token

data/deprecations/JTW_v2_update.yml

+# This is a template for a feature deprecation
+# A deprecation typically occurs when a feature or capability is planned to be removed in a future release.
+# Deprecations should be announced at least two releases prior to removal.  Any breaking changes should only be done in major releases.
+#
+# Below is an example of what a single entry should look like, it's required attributes,
+# and what types we expect those attribute values to be.
+#
+# For more information please refer to the handbook documentation here:
+# https://about.gitlab.com/handbook/marketing/blog/release-posts/#deprecations
+#
+# Please delete this line and above before submitting your merge request.
+
+- name: "Changes to the `CI_JOB_JWT`"  # The name of the feature to be deprecated
+  announcement_milestone: "14.8"  # The milestone when this feature was first announced as deprecated.
+  announcement_date: "2022-02-22"  # The date of the milestone release when this feature was first announced as deprecated. This should almost always be the 22nd of a month (YYYY-MM-22), unless you did an out of band blog post.
+  removal_milestone: "15.0"  # The milestone when this feature is planned to be removed
+  removal_date:  # The date of the milestone release when this feature is planned to be removed. This should almost always be the 22nd of a month (YYYY-MM-22), unless you did an out of band blog post.
+  breaking_change: true  # If this deprecation is a breaking change, set this value to true
+  reporter: dhershkovitch  # GitLab username of the person reporting the deprecation
+  body: |  # Do not modify this line, instead modify the lines below.
+    The `CI_JOB_JWT` will be updated to support a wider variety of cloud providers. It will be changed to match [`CI_JOB_JWT_V2`](https://docs.gitlab.com/ee/ci/variables/predefined_variables.html), but this change may not be backwards compatible for all users, including Hashicorp Vault users. To maintain the current behavior, users can switch to using `CI_JOB_JWT_V1`, or update their configuration in GitLab 15.0 to use the improved `CI_JOB_JWT`.
+# The following items are not published on the docs page, but may be used in the future.
+  stage:  # (optional - may be required in the future) String value of the stage that the feature was created in. e.g., Growth
+  tiers:  # (optional - may be required in the future) An array of tiers that the feature is available in currently.  e.g., [Free, Silver, Gold, Core, Premium, Ultimate]
+  issue_url:  # (optional) This is a link to the deprecation issue in GitLab
+  documentation_url:  # (optional) This is a link to the current documentation page
+  image_url:  # (optional) This is a link to a thumbnail image depicting the feature
+  video_url:  # (optional) Use the youtube thumbnail URL with the structure of https://img.youtube.com/vi/UNIQUEID/hqdefault.jpg

doc/update/deprecations.md

@@ -727,6 +727,18 @@ The `merged_by` field in the [merge request API](https://docs.gitlab.com/ee/api/
 
 ## 14.8
 
+### Changes to the `CI_JOB_JWT`
+
+WARNING:
+This feature will be changed or removed in 15.0
+as a [breaking change](https://docs.gitlab.com/ee/development/contributing/#breaking-changes).
+Before updating GitLab, review the details carefully to determine if you need to make any
+changes to your code, settings, or workflow.
+
+The `CI_JOB_JWT` will be updated to support a wider variety of cloud providers. It will be changed to match [`CI_JOB_JWT_V2`](https://docs.gitlab.com/ee/ci/variables/predefined_variables.html), but this change may not be backwards compatible for all users, including Hashicorp Vault users. To maintain the current behavior, users can switch to using `CI_JOB_JWT_V1`, or update their configuration in GitLab 15.0 to use the improved `CI_JOB_JWT`.
+
+**Planned removal milestone: 15.0 ()**
+
 ### Configurable Gitaly `per_repository` election strategy
 
 Configuring the `per_repository` Gitaly election strategy is [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/352612).