Add the `deprecated` field to OpenAPI definitions and JSON Schemas (#1940)

I did a quick search of the "deprecated" word in the data folder and set the
field where the description says that a property is deprecated.

This does not change the rendering of the spec because the
descriptions already talk about the deprecation,
but it can be used by tools that rely on the OpenAPI definitions and JSON Schemas.

Signed-off-by: Kévin Commaille <zecakeh@tedomum.fr>

changelogs/internal/newsfragments/1940.clarification

@@ -0,0 +1 @@
+Add the `deprecated` field to properties of OpenAPI definitions and JSON Schemas.

data/api/client-server/joining.yaml

@@ -139,6 +139,7 @@ paths:
             type: string
         - in: query
           name: server_name
+          deprecated: true
           x-changedInMatrixVersion:
             "1.12": |-
               This parameter has been deprecated in favour of `via` and will be removed in

data/api/client-server/knocking.yaml

@@ -50,6 +50,7 @@ paths:
             type: string
         - in: query
           name: server_name
+          deprecated: true
           x-changedInMatrixVersion:
             "1.12": |-
               This parameter has been deprecated in favour of `via` and will be removed in

data/api/client-server/login.yaml

@@ -119,15 +119,18 @@ paths:
                   $ref: definitions/user_identifier.yaml
                 user:
                   type: string
+                  deprecated: true
                   description: The fully qualified user ID or just local part of the user ID, to
                     log in.  Deprecated in favour of `identifier`.
                 medium:
                   type: string
+                  deprecated: true
                   description: When logging in using a third-party identifier, the medium of the
                     identifier. Must be 'email'.  Deprecated in favour of
                     `identifier`.
                 address:
                   type: string
+                  deprecated: true
                   description: Third-party identifier for the user.  Deprecated in favour of
                     `identifier`.
                 password:
@@ -194,6 +197,7 @@ paths:
                     x-addedInMatrixVersion: "1.3"
                   home_server:
                     type: string
+                    deprecated: true
                     description: |-
                       The server_name of the homeserver on which the account has
                       been registered.

data/api/client-server/registration.yaml

@@ -169,6 +169,7 @@ paths:
                     x-addedInMatrixVersion: "1.3"
                   home_server:
                     type: string
+                    deprecated: true
                     description: |-
                       The server_name of the homeserver on which the account has
                       been registered.

data/event-schemas/schema/m.room.encrypted.yaml

@@ -41,6 +41,7 @@ properties:
           Olm event. For more details, see [Messaging Algorithms](/client-server-api/#messaging-algorithms).
       sender_key:
         type: string
+        deprecated: true
         x-changedInMatrixVersion:
           "1.3": |-
             Previously this field was required, however given it offers no additional
@@ -56,6 +57,7 @@ properties:
           for more information.
       device_id:
         type: string
+        deprecated: true
         x-changedInMatrixVersion:
           "1.3": |-
             Previously this field was required for Megolm messages, however given it