Add snmp and net-snmp support for macOS and Linux

[crazywhalecc]

What does this PR do?

Fix #841

Windows support seems a little complicated. The official php group is maintaining winlibs/net-snmp. Haven't tried yet.

Checklist before merging

If your PR involves the changes mentioned below and completed the action, please tick the corresponding option.
If a modification is not involved, please skip it directly.

• If you modified *.php or *.json, run them locally to ensure your changes are valid:
  • composer cs-fix
  • composer analyse
  • composer test
  • bin/spc dev:sort-config
• If it's an extension or dependency update, please ensure the following:
  • Add your test combination to src/globals/test-extensions.php.
  • If adding new or fixing bugs, add commit message containing extension test or test extensions to trigger full test suite.

[crazywhalecc]

@henderkes Do you think it's necessary that we publish gnu-docker and alpine-docker to ghcr.io for reducing build time, at present?

[henderkes]

It would certainly help our CI. But I don't think it's necessary to save 2-3 minutes.

[henderkes]

Suggested change

	# if: ${{ failure() && matrix.os == 'ubuntu-22.04-arm' && matrix.php == '8.1' }}
	# if: ${{ failure() }}

[henderkes]

huh?