datastreams: Update mapping

[piochelepiotr]

What does this PR do?

Update mapping parameters for ddsketches to match the ones used by the Datadog backend.
This is going to avoid a conversion, which leads to precision loss & is pretty costly.

Motivation

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• System-Tests covering this feature have been added and enabled with the va.b.c-dev version tag.
• 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.
• Add an appropriate team label so this PR gets put in the right place for the release notes.
• Non-trivial go.mod changes, e.g. adding new modules, are reviewed by @DataDog/dd-trace-go-guild.

Unsure? Have a question? Request a review!

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-05-20 16:46:15

Comparing candidate commit acef50c in PR branch piotr-wolski/update-mapping with baseline commit dfa02a3 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 44 metrics, 0 unstable metrics.