feat(deno): add google-genai integration

[isaacs]

No description provided.

[sentry]

Bug: A module-level installedIntegrations array is not cleared between tests, causing subsequent init() calls to skip setup and leading to test failures.
_{Severity: MEDIUM}

Suggested Fix

The installedIntegrations array should be cleared between tests. This can be done by exporting a reset function from @sentry/core that clears the array and then calling this new function within resetGlobals(). This will ensure each test runs in a clean state.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent. Verify if this is a real issue. If it is, propose a fix; if not, explain why it's
not valid.

Location:
dev-packages/deno-integration-tests/suites/orchestrion-google-genai/test.ts#L69-L72

Potential issue: A module-level array, `installedIntegrations`, is not cleared between
tests, even when `resetGlobals()` is called. When a second test in the same file calls
`init()`, the integration's `setupOnce()` function is skipped because the integration
name is already present in the array from the first test's execution. This prevents
diagnostic channel subscriptions from being set up for the second test. Consequently,
the test times out waiting for a transaction that is never created, causing a test
failure.

Also affects:

• packages/core/src/integration.ts:10
• packages/core/src/integration.ts:117~119

_{Did we get this right? 👍 / 👎 to inform future reviews.}