chore: use guess-next-dev instead of release-branch-semver [3.0]

[erikayasuda]

• This PR updates the version_schema in the ../pyproject.toml file for the 3.0 release branch from release-branch-semver to guess-next-dev. This is to ensure that system tests work as intended with backports to this release branch.

IMPORTANT: This PR needs to be merged before the first backport is created for 3.0.Otherwise, system tests will not work as expected.

[github-actions]

CODEOWNERS have been resolved as:

pyproject.toml                                                          @DataDog/python-guild

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: script/guess-next-dev-3.0
Commit report: 0b3e3ee
Test service: dd-trace-py

✅ 0 Failed, 130 Passed, 1184 Skipped, 3m 29.33s Total duration (25m 8.41s time saved)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-02-06 21:30:58

Comparing candidate commit 0a64066 in PR branch script/guess-next-dev-3.0 with baseline commit 2ccaaef in branch 3.0.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 394 metrics, 2 unstable metrics.