Bump lxml version for py3.12 E2E tests

[Kyle-Neale]

What does this PR do?

This PR bumps lxml version to 5.1.1.

Motivation

IBM WAS was failing when testing the py3.12 Agent build with lxml==4.9.4. In the environment on Linux we see the follow error when running the manual check in debug mode - datadog-agent check ibm_was -l debug

2024-09-20 17:39:10 UTC | CORE | DEBUG | (pkg/collector/python/loader.go:162 in Load) | Unable to load python module - datadog_checks.ibm_was: unable to import module 'datadog_checks.ibm_was': Traceback (most recent call last):
  File "/opt/datadog-agent/embedded/lib/python3.12/site-packages/datadog_checks/ibm_was/__init__.py", line 5, in <module>
    from .ibm_was import IbmWasCheck
  File "/opt/datadog-agent/embedded/lib/python3.12/site-packages/datadog_checks/ibm_was/ibm_was.py", line 7, in <module>
    from lxml import etree
ImportError: /opt/datadog-agent/embedded/lib/python3.12/site-packages/lxml/etree.cpython-312-x86_64-linux-gnu.so: undefined symbol: xsltGetProfileInformation

Additional Notes

These two issues seem to suggest we can't build lxml with CPython3.12

• Python3.12 compatibility will require lxml 5.0.0 ADTRAN/netconf_client#29
• dependencies: bump lxml <5 version constraint for Python 3.12 streamlink/streamlink#5336

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Changelog entries must be created for modifications to shipped code
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.52%. Comparing base (8da9ca8) to head (3b0a8f4).
Report is 11 commits behind head on master.

Additional details and impacted files

Flag	Coverage Δ
activemq	?
cassandra	?
hive	?
hivemq	?
ibm_was	96.06% <ø> (+0.03%)	⬆️
ignite	?
jboss_wildfly	?
kafka	?
presto	?
solr	?
sqlserver	71.21% <ø> (-13.83%)	⬇️

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