Update beats framework to 74b9d4a0e53a (7.x)

[axw]

Motivation/summary

Update beats to bring in elastic/beats#20753

Checklist

• I have signed the Contributor License Agreement.
  - [ ] I have updated CHANGELOG.asciidoc

I have considered changes for:
- [ ] documentation
- [ ] logging (add log lines, choose appropriate log selector, etc.)
- [ ] metrics and monitoring (create issue for Kibana team to add metrics to visualizations, e.g. Kibana#44001)

• automated tests (add tests for the code changes, all unit tests pass locally)
  - [ ] telemetry
  - [ ] Elasticsearch Service (https://cloud.elastic.co)
  - [ ] Elastic Cloud Enterprise (https://www.elastic.co/products/ece)
  - [ ] Elastic Cloud on Kubernetes (https://www.elastic.co/elastic-cloud-kubernetes)

How to test these changes

PLATFORMS=linux/amd64 TYPES=docker mage package

Should build a ubi8-minimal based image: build/distributions/apm-server-ubi8-7.10.0-linux-amd64.docker.tar.gz

Related issues

#4066

[apmmachine]

💚 Build Succeeded

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Build stats

• Build Cause: [Pull request #4106 opened]

• Start Time: 2020-08-25T08:14:19.466+0000

• Duration: 26 min 20 sec

Test stats 🧪

Test	Results
Failed	0
Passed	3028
Skipped	150
Total	3178

Steps errors

Expand to view the steps failures

• Name: Compress

  • Description: tar --exclude=coverage-files.tgz -czf coverage-files.tgz coverage

  • Duration: 0 min 0 sec

  • Start Time: 2020-08-25T08:29:16.253+0000

  • log

• Name: Compress

  • Description: tar --exclude=system-tests-linux-files.tgz -czf system-tests-linux-files.tgz system-tests

  • Duration: 0 min 0 sec

  • Start Time: 2020-08-25T08:40:37.261+0000

  • log

• Name: Test Sync

  • Description: ./script/jenkins/sync.sh

  • Duration: 3 min 58 sec

  • Start Time: 2020-08-25T08:24:28.006+0000

  • log