Slack Integration: Automatic parsing of a channel name via link_names may lead to incorrect notification

### Environment self-hosted ([https://develop.sentry.dev/self-hosted/](<https://develop.sentry.dev/self-hosted/>)) ### Version 22.3.0 ### Link *No response* ### DSN *No response* ### Steps to Reproduce 1. Create private slack channel named `#1` 2. Trigger an exception with message `array_splice(): Argument #1 ($array) must be of type array, int given` ### Expected Result Notification with text `array_splice(): Argument #1 ($array) must be of type array, int given` is received ### Actual Result Automatic parsing happens due to `link_names` option enabled, and notification is displayed as `array_splice(): Argument private channel ($array) must be of type array, int given`  There is another issue related to `link_names` option [https://github.com/getsentry/sentry/issues/19271](<https://github.com/getsentry/sentry/issues/19271>) and simply changing `link_names` to `0` may break mentioned workaround in that issue for anyone using it. Slack Recommendations: [https://api.slack.com/reference/surfaces/formatting#automatic-parsing__why-you-should-consider-disabling-automatic-parsing](<https://api.slack.com/reference/surfaces/formatting#automatic-parsing__why-you-should-consider-disabling-automatic-parsing>) We want to define a set of [lightweight metrics](<https://docs.sentry.io/product/explore/metrics/>) that SDKs can automatically collect for e.g. framework, language or platform, focusing only on signals that **do NOT overlap with Tracing**. Ideally these metrics should give a quick sense of app or runtime health, … while deeper invest…