Enable independent agents if root privileges are required at both package or data stream level

[mrodm]

Follows #1724 Relates #1586

This PR also enables independent Elastic Agents in case root privileges are defined in the Data Stream manifest.

If any of the two files (package manifest or Data Stream manifest) defines that root privileges are required, it is enabled independent Elastic Agents.

As previously, if the environment variable ELASTIC_PACKAGE_TEST_ENABLE_INDEPENENT_AGENT is set, it has preference over the values defined in those manifests.

[mrodm]

test integrations

[elasticmachine]

Created or updated PR in integrations repository to test this version. Check https://github.com/elastic/integrations/pull/9904

[elasticmachine]

:broken_heart: Build Failed

• Buildkite Build
• Commit: 1ceeb4473c5fd3bf9349a9dba70b1d2c737e34e7

Failed CI Steps

• :go: Integration test: stack-command-8x
• :go: Integration test: benchmarks

History

• :broken_heart: Build #3126 failed bcdaf8a401b2b4c8348bd67771399dbd2f1b2494
• :broken_heart: Build #3118 failed 3cde989e2385c7cda118a96cd21ac1f44c4eb63b
• :broken_heart: Build #3116 failed 8ef43fba02c904feeaf6b5adea10fb2fa48208d4
• :broken_heart: Build #3114 failed edc969d5889238a65be637e6d6a21c53a4b604e1

cc @mrodm

[mrodm]

Failures are unrelated, merging.