Merge "[Spec Lite] Deprecate cachemanage middleware"

specs/2024.1/approved/glance/deprecate-cachemanage-middleware.rst

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+..
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+ http://creativecommons.org/licenses/by/3.0/legalcode
+
+===========================================
+Spec Lite: Deprecate cachemanage middleware
+===========================================
+
+..
+  Mandatory sections
+
+:project: glance
+
+:problem: Deprecate cachemanage middleware
+
+:solution: Cache operations (CR(u)D) is now part of glance API. Even though
+           we need to depend on cache middleware to enable it. There are two
+           middlewares related to caching, one is `cache` and other is
+           `cachemanage` and we can now get rid of `cachemanage` middleware and
+           glance-cache-manage  command line utility.
+
+:impacts: None
+
+:how: In this cycle we are going to deprecate cachemanage middleware and api
+      pipeline `keystone+cachemanage` (defined in glance-api-paste.ini) and
+      `glance-cache-manage` command line utility. A deprecation warning
+      message will be added to each command of `glance-cache-manage` utility
+      as well as during initialization of `cachemanage` middleware.
+
+:alternatives: None
+
+:timeline: Milestone 2
+
+:link: None
+
+:reviewers: pdeore, mrjoshi, croelandt
+
+:assignee: abhishekk