feat(tester): add UpdateParticipant endpoint

tester/v1/openapi.yaml

@@ -291,6 +291,26 @@ paths:
       responses:
         "200":
           description: OK
+    patch:
+      operationId: UpdateParticipant
+      security:
+        - bearerAuth: [ ]
+      parameters:
+        - name: participant_id
+          in: query
+          required: true
+          schema:
+            type: integer
+            format: int32
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UpdateParticipantRequest'
+      responses:
+        "200":
+          description: OK
 components:
   schemas:
     Problem:
@@ -641,6 +661,11 @@ components:
       properties:
         title:
           type: string
+    UpdateParticipantRequest:
+      type: object
+      properties:
+        name:
+          type: string
   securitySchemes:
     bearerAuth:
       type: http