Backport: [v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching

[github-actions]

This is an automated backport of #16790 to the release-v5.0 branch. FYI @gr2m
This backport has conflicts that need to be resolved manually.

git cherry-pick output

CONFLICT (modify/delete): packages/langchain/src/__snapshots__/langgraph-hitl-request-1.json deleted in HEAD and modified in ea6eb0adc8 ([v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching (#16790)).  Version ea6eb0adc8 ([v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching (#16790)) of packages/langchain/src/__snapshots__/langgraph-hitl-request-1.json left in tree.
CONFLICT (modify/delete): packages/langchain/src/adapter.test.ts deleted in HEAD and modified in ea6eb0adc8 ([v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching (#16790)).  Version ea6eb0adc8 ([v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching (#16790)) of packages/langchain/src/adapter.test.ts left in tree.
CONFLICT (modify/delete): packages/langchain/src/utils.ts deleted in HEAD and modified in ea6eb0adc8 ([v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching (#16790)).  Version ea6eb0adc8 ([v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching (#16790)) of packages/langchain/src/utils.ts left in tree.
error: could not apply ea6eb0adc8... [v6.0] fix(langchain): register key mapping for tool calls emitted via messages mode for HITL interrupt matching (#16790)
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