Sync value files from GenAIInfra (#1428)

All gaudi values updated with extra flags.
Added helm support for 2 new examples Text2Image and SearchQnA. Minor fix for llm-uservice.

Signed-off-by: Dolpher Du <dolpher.du@intel.com>

Text2Image/kubernetes/helm/README.md

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+# Deploy txt2img on Kubernetes cluster
+
+- You should have Helm (version >= 3.15) installed. Refer to the [Helm Installation Guide](https://helm.sh/docs/intro/install/) for more information.
+- For more deploy options, refer to [helm charts README](https://github.com/opea-project/GenAIInfra/tree/main/helm-charts#readme).
+
+## Deploy on Xeon
+
+```
+export HFTOKEN="insert-your-huggingface-token-here"
+helm install txt2img oci://ghcr.io/opea-project/charts/txt2img  --set global.HUGGINGFACEHUB_API_TOKEN=${HFTOKEN} -f cpu-values.yaml
+```
+
+## Deploy on Gaudi
+
+```
+export HFTOKEN="insert-your-huggingface-token-here"
+helm install txt2img oci://ghcr.io/opea-project/charts/txt2img  --set global.HUGGINGFACEHUB_API_TOKEN=${HFTOKEN} -f gaudi-values.yaml
+```

Text2Image/kubernetes/helm/cpu-values.yaml

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+# Copyright (C) 2025 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+text2image:
+  image:
+    repository: opea/text2image

Text2Image/kubernetes/helm/gaudi-values.yaml

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+# Copyright (C) 2025 Intel Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+text2image:
+  accelDevice: "gaudi"
+  image:
+    repository: opea/text2image-gaudi
+  resources:
+    limits:
+      habana.ai/gaudi: 1
+      # The following hugepage related settings is for default MODEL stable-diffusion-v1-5/stable-diffusion-v1-5
+      # User should change the resource limits for other models
+      hugepages-2Mi: 256Mi
+  volumes:
+    - name: hugepage-2mi
+      emptyDir:
+        medium: HugePages-2Mi
+  volumeMounts:
+    - name: hugepage-2mi
+      mountPath: /hugepages-2Mi
+  OMPI_MCA_btl_vader_single_copy_mechanism: "none"
+  readinessProbe:
+    initialDelaySeconds: 5
+    periodSeconds: 5
+    timeoutSeconds: 1
+  startupProbe:
+    initialDelaySeconds: 5
+    periodSeconds: 5
+    timeoutSeconds: 1
+    failureThreshold: 120