[system][process] add swap field to memory group

[stefans-elastic]

Proposed commit message

Added swap field to system.process.memory dataset.
This integrations part of beats change - elastic/beats#48334.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

Author's Checklist

• [ ]

How to test this PR locally

The way to test it on macos:

1. Launch ubuntu in docker

docker run -it --rm --privileged \
  --network elastic-package-stack_default \
  --name my-ubuntu-swap-test \
  --memory="300m" \
  -v /swap_storage \
  ubuntu:latest bash

2. Run the commands to enable swap

# 1. Install tools
apt update && apt install -y stress-ng

# 2. Create the file INSIDE the volume
dd if=/dev/zero of=/swap_storage/swapfile bs=1M count=512

# 3. Secure and Enable
chmod 600 /swap_storage/swapfile
mkswap /swap_storage/swapfile
swapon /swap_storage/swapfile

3. Verify swap is enabled with free -h command (you shouldn't see zeroes in Swap row)
4. Install and enroll Agent.

Related issues

Screenshots

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• Commit: cbd18a6

History

• 💚 Build #36071 succeeded 9696f30

[ishleenk17]

Looks good!

[elastic-vault-github-plugin-prod]

Package system - 2.12.0 containing this change is available at https://epr.elastic.co/package/system/2.12.0/