pass tenant id to tools

[Hailong-am]

Description

Pass tenant id from agent to tools

Related Issues

Resolves #[Issue number to be closed when this PR is merged]

Check List

• New functionality includes testing.
• New functionality has been documented.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff.
• Public documentation issue/PR created.

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[jiapingzeng]

@Hailong-am this change breaks agent execution when no tenant ID is specified in the request:

[2025-11-25T16:03:21,027][ERROR][o.o.m.e.a.a.MLChatAgentRunner] [integTest-0] Failed to run chat agent
java.lang.NullPointerException: null
        at java.base/java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011) ~[?:?]
        at java.base/java.util.concurrent.ConcurrentHashMap.putAll(ConcurrentHashMap.java:1089) ~[?:?]
        at org.opensearch.ml.engine.algorithms.agent.MLChatAgentRunner.lambda$runReAct$3(MLChatAgentRunner.java:505) ~[?:?]
        at org.opensearch.core.action.ActionListener$1.onResponse(ActionListener.java:82) ~[opensearch-core-3.4.0-SNAPSHOT.jar:3.4.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.ListenableFuture$1.doRun(ListenableFuture.java:126) ~[opensearch-3.4.0-SNAPSHOT.jar:3.4.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:52) ~[opensearch-3.4.0-SNAPSHOT.jar:3.4.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.OpenSearchExecutors$DirectExecutorService.execute(OpenSearchExecutors.java:341) ~[opensearch-3.4.0-SNAPSHOT.jar:3.4.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.ListenableFuture.notifyListener(ListenableFuture.java:120) ~[opensearch-3.4.0-SNAPSHOT.jar:3.4.0-SNAPSHOT]
        at org.opensearch.common.util.concurrent.ListenableFuture.lambda$done$0(ListenableFuture.java:112) ~[opensearch-3.4.0-SNAPSHOT.jar:3.4.0-SNAPSHOT]
        at java.base/java.util.ArrayList.forEach(ArrayList.java:1596) ~[?:?]

Can we do

                            if (tenantId != null) {
                                toolParams.put(TENANT_ID_FIELD, tenantId);
                            }

[jiapingzeng]

Oh, I see that this will be fixed in #4463