appsec: update the security event rules to v1.8.0

[eliottness]

What does this PR do?

This PR follows up on DataDog/appsec-internal-go#8 to upgrade the recommended appsec ruleset to all location where it is used.

Moreover this PR removes the previous ruleset location which was directly in internal/appsec/ in favor of the one in appsec-internal-go

Motivation

1. ASM customers can benefit from the up-to-date the datadog recommended ruleset.
2. Having the ruleset at 2 locations is unnecessary.

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• There is a benchmark for any new code, or changes to existing code.
• If this interacts with the agent in a new way, a system test has been added.

For Datadog employees:

• If this PR touches code that handles credentials of any kind, such as Datadog API keys, I've requested a review from @DataDog/security-design-and-guidance.
• This PR doesn't touch any of that.

Unsure? Have a question? Request a review!

[pr-commenter]

Benchmarks

Benchmark execution time: 2023-10-30 17:22:37

Comparing candidate commit 589e224 in PR branch eliott.bouhana/APPSEC-11819 with baseline commit 1e7a3e0 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 40 metrics, 1 unstable metrics.

[Hellzy]

LGTM.
Nit: I'm not sure about the import aliasing. The package is bound to export more functions that are not related to rules. A simple internal may reduce future confusion. Thoughts?

Also, here is a system-tests run with this PR and the system-tests one combined: https://github.com/DataDog/dd-trace-go/actions/runs/6695124720