fix: add explicit command to v0.8.2 simulator models to prevent bash … (#765)

…wrapper

## Description

KServe's LLMInferenceServiceConfig template injects `command:
["/bin/bash", "-c"]` for containers without an explicit command, causing
v0.8.2 simulator models to crash with "invalid option" errors. This adds
the explicit command back to all v0.8.2 simulator model YAMLs and
updates trlp-test to v0.8.2 with consistent args.


## How Has This Been Tested?
Currently running smoke test, but models no longer in CrashLoopBackOff. 
```
$ oc get pods -n llm
NAME                                                              READY   STATUS    RESTARTS   AGE
e2e-distinct-2-simulated-kserve-7f849f6b56-kpwp9                  1/1     Running   0          21s
e2e-distinct-simulated-kserve-7bb4cdb4d7-frnz5                    1/1     Running   0          87s
e2e-trlp-test-simulated-kserve-84db68679b-t98f7                   1/1     Running   0          64s
e2e-unconfigured-facebook-opt-125m-simulated-kserve-75cdcctjp2d   1/1     Running   0          66s
facebook-opt-125m-simulated-kserve-8f8dc67b7-4x7g9                1/1     Running   0          57s
premium-simulated-simulated-premium-kserve-6b97b89985-ln8r2       1/1     Running   0          70s
```


## Merge criteria:
<!--- This PR will be merged by any repository approver when it meets
all the points in the checklist -->
<!--- Go over all the following points, and put an `x` in all the boxes
that apply. -->

- [ ] The commits are squashed in a cohesive manner and have meaningful
messages.
- [ ] Testing instructions have been added in the PR body (for PRs
involving changes that are not immediately obvious).
- [ ] The developer has manually tested the changes and verified that
the changes work


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **Documentation**
* Updated sample model configurations to explicitly specify container
execution commands for improved clarity and consistency across all
sample deployments.

* **Tests**
* Upgraded test simulator fixture to version 0.8.2 with enhanced
configuration options.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: jrhyness

docs/samples/models/e2e-distinct-2-simulated/model.yaml

@@ -19,6 +19,7 @@ spec:
       - name: main
         image: "ghcr.io/llm-d/llm-d-inference-sim:v0.8.2"
         imagePullPolicy: Always
+        command: ["/app/llm-d-inference-sim"]
         args:
         - --port
         - "8000"

docs/samples/models/e2e-distinct-simulated/model.yaml

@@ -19,6 +19,7 @@ spec:
       - name: main
         image: "ghcr.io/llm-d/llm-d-inference-sim:v0.8.2"
         imagePullPolicy: Always
+        command: ["/app/llm-d-inference-sim"]
         args:
         - --port
         - "8000"

docs/samples/models/simulator-premium/model.yaml

@@ -19,6 +19,7 @@ spec:
       - name: main
         image: "ghcr.io/llm-d/llm-d-inference-sim:v0.8.2"
         imagePullPolicy: Always
+        command: ["/app/llm-d-inference-sim"]
         args:
         - --port
         - "8000"

docs/samples/models/simulator/model.yaml

@@ -22,6 +22,7 @@ spec:
       - name: main
         image: "ghcr.io/llm-d/llm-d-inference-sim:v0.8.2"
         imagePullPolicy: Always
+        command: ["/app/llm-d-inference-sim"]
         args:
         - --port
         - "8000"

test/e2e/fixtures/trlp-test/llm/llmis.yaml

@@ -17,7 +17,7 @@ spec:
   template:
     containers:
       - name: main
-        image: "ghcr.io/llm-d/llm-d-inference-sim:v0.7.1"
+        image: "ghcr.io/llm-d/llm-d-inference-sim:v0.8.2"
         imagePullPolicy: Always
         command: ["/app/llm-d-inference-sim"]
         args:
@@ -27,6 +27,7 @@ spec:
         - test/e2e-trlp-test-model
         - --mode
         - random
+        - --no-mm-encoder-only
         - --ssl-certfile
         - /var/run/kserve/tls/tls.crt
         - --ssl-keyfile
@@ -42,6 +43,11 @@ spec:
               fieldRef:
                 apiVersion: v1
                 fieldPath: metadata.namespace
+          - name: POD_IP
+            valueFrom:
+              fieldRef:
+                apiVersion: v1
+                fieldPath: status.podIP
         ports:
           - name: https
             containerPort: 8000