Feature parity between Python network check and Go network check

[rahulkaukuntla]

What does this PR do?

Adding features to the go network check:

• allowing for the configuration of the procfs_path to potentially be a path besides "/proc" (mimicked the logic from here)
• adding general testing coverage to the netstatTCPExtCounters method.
• adding more TCP and TCPExt metrics from the list of Python check metrics.

Motivation

Describe how you validated your changes

Possible Drawbacks / Trade-offs

Additional Notes

[bits-bot]

All committers have signed the CLA.

[agent-platform-auto-pr]

Uncompressed package size comparison

Comparison with ancestor 43d0d592cd00b57095ce53b6c4a38dc7e1e09bac

Diff per package

package	diff	status	size	ancestor	threshold
datadog-agent-amd64-deb	0.03MB	⚠️	928.66MB	928.63MB	0.50MB
datadog-agent-x86_64-rpm	0.03MB	⚠️	938.33MB	938.29MB	0.50MB
datadog-agent-x86_64-suse	0.03MB	⚠️	938.33MB	938.29MB	0.50MB
datadog-agent-arm64-deb	0.01MB	⚠️	915.83MB	915.82MB	0.50MB
datadog-agent-aarch64-rpm	0.01MB	⚠️	925.47MB	925.46MB	0.50MB
datadog-iot-agent-aarch64-rpm	0.01MB	⚠️	90.02MB	90.02MB	0.50MB
datadog-iot-agent-arm64-deb	0.01MB	⚠️	89.95MB	89.95MB	0.50MB
datadog-iot-agent-amd64-deb	0.00MB	✅	93.90MB	93.90MB	0.50MB
datadog-iot-agent-x86_64-rpm	0.00MB	✅	93.97MB	93.97MB	0.50MB
datadog-iot-agent-x86_64-suse	0.00MB	✅	93.97MB	93.97MB	0.50MB
datadog-dogstatsd-amd64-deb	0.00MB	✅	58.85MB	58.85MB	0.50MB
datadog-dogstatsd-x86_64-rpm	0.00MB	✅	58.93MB	58.93MB	0.50MB
datadog-dogstatsd-x86_64-suse	0.00MB	✅	58.93MB	58.93MB	0.50MB
datadog-dogstatsd-arm64-deb	0.00MB	✅	56.36MB	56.36MB	0.50MB
datadog-heroku-agent-amd64-deb	0.00MB	✅	478.18MB	478.18MB	0.50MB

Decision

⚠️ Warning

[agent-platform-auto-pr]

Test changes on VM

Use this command from test-infra-definitions to manually test this PR changes on a VM:

inv aws.create-vm --pipeline-id=53925070 --os-family=ubuntu

Note: This applies to commit 9910431