chore(langchain): make langchain version skip conditional less precise for CI

[Yun-Kim]

Even after #9768 we're still seeing some tests be skipped on CI, specifically langchain-community tests even when langchain>=0.1. My suspicion is that the sys.version_info < (0, 1, 0) conditional that is used for the test skipping is too precise for the versions of Langchain being run on CI (not exactly sure what the issue is, but I've narrowed it down to that area). This PR only checks the major and minor version of Langchain being run

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

tests/contrib/langchain/test_langchain_community.py                     @DataDog/ml-observability

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: yunkim/langchain-community-flaky
Commit report: 0def0a9
Test service: dd-trace-py

✅ 0 Failed, 425 Passed, 151 Skipped, 7m 36.68s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-07-30 21:45:00

Comparing candidate commit f0a29e5 in PR branch yunkim/langchain-community-flaky with baseline commit 07f0752 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 208 metrics, 2 unstable metrics.