Remove Python system tests

[axw]

Motivation/summary

Remove old Python-based system tests. The remaining tests are either redundant (already have Go equivalents), or are about to be irrelevant as we remove support for index/ingest management.

This change means that sample event documents will be frozen in time. We should come back to these and replace the formerly generated system test documents with documents from ~real applications, like we did for metrics in #6173.

Checklist

- [ ] Update CHANGELOG.asciidoc

• Documentation has been updated

How to test these changes

Related issues

[apmmachine]

💔 Tests Failed

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Build stats

• Start Time: 2021-11-09T03:47:20.143+0000

• Duration: 39 min 10 sec

• Commit: 427fd36

Test stats 🧪

Test	Results
Failed	2
Passed	6215
Skipped	19
Total	6236

Test errors

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Build and Test / System and Environment Tests / TestRUMXForwardedFor/data_streams_enabled – github.com/elastic/apm-server/systemtest

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 Failed 

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 === RUN   TestRUMXForwardedFor/data_streams_enabled
    rum_test.go:70: context deadline exceeded
    server.go:193: log file: /var/lib/jenkins/workspace/pm-server_apm-server-mbp_PR-6555/src/github.com/elastic/apm-server/systemtest/logs/TestRUMXForwardedFor_data_streams_enabled/apm-server
    --- FAIL: TestRUMXForwardedFor/data_streams_enabled (60.70s)
 

Build and Test / System and Environment Tests / TestRUMXForwardedFor – github.com/elastic/apm-server/systemtest

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 Failed 

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 === RUN   TestRUMXForwardedFor
--- FAIL: TestRUMXForwardedFor (64.57s)
 

Steps errors

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Run Linux tests

• Took 15 min 27 sec . View more details here
• Description: ./.ci/scripts/linux-test.sh

Compress

• Took 0 min 0 sec . View more details here
• Description: tar --exclude=system-tests-linux-files.tgz -czf system-tests-linux-files.tgz system-tests

🤖 GitHub comments

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[axw]

/test

[marclop]

yay!

[axw]

Unrelated test failure