Generator: Update SDK /services/iaas (#3402)

* Generate iaas v0.28.0

- **Docs:** Improved descriptions of properties in structs with their possible values
- **Feature:** Add `Agent` field to `CreateImagePayload`, `UpdateImagePayload` and `Image` model
- **Feature:** Add `Encrypted` and `EncryptionsParameters` fields to `CreateVolumePayload` model

---------

Co-authored-by: Marcel Jacek <Marcel.Jacek@stackit.cloud>

Author: stackit-pipeline

CHANGELOG.md

@@ -22,8 +22,13 @@
   - **Dependencies:** Bump `github.com/golang-jwt/jwt/v5` from `v5.2.2` to `v5.2.3`
 - `git`: [v0.7.1](services/git/CHANGELOG.md#v071) 
   - **Dependencies:** Bump `github.com/golang-jwt/jwt/v5` from `v5.2.2` to `v5.2.3`
-- `iaas`: [v0.27.1](services/iaas/CHANGELOG.md#v0271) 
-  - **Dependencies:** Bump `github.com/golang-jwt/jwt/v5` from `v5.2.2` to `v5.2.3`
+- `iaas`:
+  - [v0.28.0](services/iaas/CHANGELOG.md#v0280)
+    - **Docs:** Improved descriptions of properties in structs with their possible values
+    - **Feature:** Add `Agent` field to `CreateImagePayload`, `UpdateImagePayload` and `Image` model
+    - **Feature:** Add `Encrypted` and `EncryptionsParameters` fields to `CreateVolumePayload` model
+  - [v0.27.1](services/iaas/CHANGELOG.md#v0271) 
+    - **Dependencies:** Bump `github.com/golang-jwt/jwt/v5` from `v5.2.2` to `v5.2.3`
 - `intake`: [v0.1.0](services/intake/CHANGELOG.md#v010)
   - **New**: STACKIT Intake module can be used to manage the STACKIT Intake. Manage your `IntakeRunners`, `Intakes` and `IntakeUsers`
 - `kms`: [v0.3.1](services/kms/CHANGELOG.md#v031) 

services/iaas/CHANGELOG.md

@@ -1,5 +1,10 @@
+## v0.28.0
+- **Docs:** Improved descriptions of properties in structs with their possible values
+- **Feature:** Add `Agent` field to `CreateImagePayload`, `UpdateImagePayload` and `Image` model
+- **Feature:** Add `Encrypted` and `EncryptionsParameters` fields to `CreateVolumePayload` model
+
 ## v0.27.1
-  - **Dependencies:** Bump `github.com/golang-jwt/jwt/v5` from `v5.2.2` to `v5.2.3`
+- **Dependencies:** Bump `github.com/golang-jwt/jwt/v5` from `v5.2.2` to `v5.2.3`
 
 ## v0.27.0
 - **Feature:** Add `Dhcp` field in `CreateNetworkPayload`, `Network` and `PartialUpdateNetworkPayload` models

services/iaas/VERSION

@@ -1 +1 @@
-v0.27.1
+v0.28.0