Remove @opentelemetry/instrumentation dependency from @sentry/node #22759

After removing the iitm-based instrumentations (#22346) and the deprecated InstrumentationBase-derived classes, @sentry/node no longer registers any OpenTelemetry/import-in-the-middle module patchers. But it still depends on @opentelemetry/instrumentation for a handful of live imports. This ticket tracks vendoring/reimplementing those so we can drop the dependency, mirroring the @opentelemetry/core removal effort in #21674.

Remaining consumers (as of #22346 end state)

Live code imports:

• packages/node/src/otel/instrument.ts — registerInstrumentations, Instrumentation (type). Backs generateInstrumentOnce, which is a public export (src/index.ts).
• packages/node/src/utils/ensureIsWrapped.ts — isWrapped. Used by the Express/Koa/Hapi/Fastify error-handler setup to warn if the app object wasn't wrapped.

Type-only imports (trivial to inline):

• packages/node/src/integrations/http/SentryHttpInstrumentation.ts — InstrumentationConfig, base of the public SentryHttpInstrumentationOptions.
• packages/node/src/integrations/tracing/redis/vendored/types.ts — InstrumentationConfig, base of the redis cache option types used by cache.ts.

Work

• Reimplement or vendor registerInstrumentations + the Instrumentation type behind generateInstrumentOnce (or evaluate whether generateInstrumentOnce still needs to exist at all now that nothing internal calls it — it only remains as a public export).
• Reimplement/vendor isWrapped (small shimmer helper).
• Inline the two InstrumentationConfig type usages.
• Drop @opentelemetry/instrumentation from packages/node/package.json.

Notes

• Gated on Remove iitm-based instrumentations from @sentry/node #22346 (iitm instrumentation removal) landing first.
• Overlaps with ensureIsWrapped emits false "not instrumented" warnings for channel-based Express/Koa/Hapi #22555: removing/replacing isWrapped is a chance to also fix the false "not instrumented" warnings that ensureIsWrapped now emits for channel-based Express/Koa/Hapi. Consider folding that fix in here.
• Sibling of the @opentelemetry/core removal (Remove @opentelemetry/core dependency #21674); same vendor-then-drop shape.
• Related: Remove iitm-based instrumentations from @sentry/core #22489 (remove iitm-based instrumentations from @sentry/core).