fix(deno): Enable sessions for HTTP requests

[AG0708]

Deno's node:http server integration disabled release-health sessions even
though the shared HTTP instrumentation enables them by default. Keeping the
shared default aligns Deno with the other server runtimes and restores session
aggregates for incoming requests when a release is configured.

Root cause

The Deno integration passed sessions: false when it subscribed to shared HTTP
server instrumentation. There is no Deno-specific duplicate instrumentation
that requires that override.

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Fixes #22888

[JPeer264]

Hey @AG0708 thanks for your contribution. May I ask if there is an existing issue for this?

But I see that the JSDoc actually says that the default is true.

[AG0708]

Yes—this addresses #22888, which reports that the Deno HTTP integration hard-codes sessions: false despite the shared instrumentation default. The PR body also includes Fixes #22888.

[AG0708]

I rebased this branch onto current develop (71f66dc4), which includes #23391, the upstream pin for the LangChain ESM export failure seen in all five red Node integration jobs. Those failures were in the untouched tracing/langchain/v1 suite; the Deno-focused package tests, transpile, type builds, lint, and formatting had passed before the rebase. The refreshed CI run should now exercise this patch with that upstream dependency fix included.