feat(api): move application service v2beta to GA (and deprecate v2beta) (#10846)

# Which Problems Are Solved

As part of our efforts to simplify the structure and versions of our
APIs, were moving all existing v2beta endpoints to v2 and deprecate
them. They will be removed in Zitadel V5.

# How the Problems Are Solved

- This PR moves app v2beta service and its endpoints to a corresponding
to application v2 version. The v2beta service and endpoints are
deprecated.
- The comments and have been improved and, where not already done, moved
from swagger annotations to proto.
- All required fields have been marked with (google.api.field_behavior)
= REQUIRED and validation rules have been added where missing.
- Name ID of the application always `application_id`, previously was
also `id` and `app_id`.
- Get rid of all `app` abbreviations and name it `application` including
the service name, `AppState` -> `ApplicationState` and `AppSorting` ->
`ApplicationSorting`
- Updated `CreateApplicationRequest`:
- renamed `creation_request_type` to `application_type` and all its
options to `XY_configuration` instead of `XY_request`
- `RegenerateClientSecret`
  - renamed method to `GenerateClientSecret`
  - removed `app_type` from request
- `ListApplicationRequest`:
  - removed required `project_id` and provided it as a filter
- Type `ApplicationNameQuery` has been renamed to
`ApplicationNameFilter` as its usage in the request
- Renamed all fields and types from `config` to `configuration`
- Updated `DeleteApplicationKeyRequest`
  - removed `organization_id`
- Updated `GetApplicationKeyRequest`:
  - removed `project_id`, `application_id` and `organization_id``
- Updated `ListApplicationKeysRequest`:
  - removed oneOf `resource_id` and moved the options into filters
- Name ID of the application key always `key_id`.
- removed unnecessary package prefixed (`zitadel.application.v2`)
- formatted using `buf`

# Additional Changes

None

# Additional Context

- part of https://github.com/zitadel/zitadel/issues/10772
- requires backport to v4.x

(cherry picked from commit 0281670030)

docs/sidebars.js

@@ -19,7 +19,7 @@ const sidebar_api_webkey_service_v2 = require("./docs/apis/resources/webkey_serv
 const sidebar_api_instance_service_v2 = require("./docs/apis/resources/instance_service_v2/sidebar.ts").default
 const sidebar_api_authorization_service_v2 = require("./docs/apis/resources/authorization_service_v2/sidebar.ts").default
 const sidebar_api_internal_permission_service_v2 = require("./docs/apis/resources/internal_permission_service_v2/sidebar.ts").default
-const sidebar_api_app_v2 = require("./docs/apis/resources/application_service_v2/sidebar.ts").default
+const sidebar_api_application_v2 = require("./docs/apis/resources/application_service_v2/sidebar.ts").default
 
 module.exports = {
   guides: [
@@ -857,19 +857,17 @@ module.exports = {
             },
             {
               type: "category",
-              label: "App (Beta)",
+              label: "Application",
               link: {
                 type: "generated-index",
-                title: "Application Service API (Beta)",
+                title: "Application Service API",
                 slug: "/apis/resources/application_service_v2",
                 description:
                   "This API lets you manage Zitadel applications (API, SAML, OIDC).\n" +
                   "\n" +
-                  "The API offers generic endpoints that work for all app types (API, SAML, OIDC), " +
-                  "\n" +
-                  "This API is in beta state. It can AND will continue breaking until a stable version is released.\n"
+                  "The API offers generic endpoints that work for all app types (API, SAML, OIDC), "
               },
-              items: sidebar_api_app_v2,
+              items: sidebar_api_application_v2,
             },
             {
               type: "category",