Updated deprecated features table (#1214)

* Add missing entries to deprecated features table

* Remove reference to version in filename

* Add redirects

* Update canonical links

* Update sidebars

* Update header capitalization

Co-authored-by: Marty Hernandez Avedon <martyavedon@gmail.com>

---------

Co-authored-by: Marty Hernandez Avedon <martyavedon@gmail.com>

versioned_sidebars/version-2.6-sidebars.json

@@ -1193,7 +1193,7 @@
       "label": "FAQ",
       "items": [
         "faq/general-faq",
-        "faq/deprecated-features-in-v2.5",
+        "faq/deprecated-features",
         "faq/install-and-configure-kubectl",
         "faq/dockershim",
         "faq/technical-items",