feat(inputs.infiniband_hw): add a new input plugin for Infiniband card/ports HW statistics

[izekr]

Summary

This PR introduces a new input plugin for Telegraf to collect InfiniBand hardware (RDMA diagnostics) statistics in a Linux environment. The plugin gathers statistics from the hardware counters located under (for example):
/sys/class/infiniband/mlx5_0/ports/1/hw_counters/

Checklist

• No AI generated code was used in this PR

Related issues

resolves #16334
superseeds #16335

[telegraf-tiger]

Thanks so much for the pull request!
🤝 ✒️ Just a reminder that the CLA has not yet been signed, and we'll need it before merging. Please sign the CLA when you get a chance, then post a comment here saying !signed-cla

[telegraf-tiger]

Download PR build artifacts for linux_amd64.tar.gz, darwin_arm64.tar.gz, and windows_amd64.zip.
Downloads for additional architectures and packages are available below.

☺️ This pull request doesn't significantly change the Telegraf binary size (less than 1%)

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Artifact URLs

DEB	RPM	TAR GZ	ZIP
amd64.deb	aarch64.rpm	darwin_amd64.tar.gz	windows_amd64.zip
arm64.deb	armel.rpm	darwin_arm64.tar.gz	windows_arm64.zip
armel.deb	armv6hl.rpm	freebsd_amd64.tar.gz	windows_i386.zip
armhf.deb	i386.rpm	freebsd_armv7.tar.gz
i386.deb	ppc64le.rpm	freebsd_i386.tar.gz
mips.deb	riscv64.rpm	linux_amd64.tar.gz
mipsel.deb	s390x.rpm	linux_arm64.tar.gz
ppc64el.deb	x86_64.rpm	linux_armel.tar.gz
riscv64.deb		linux_armhf.tar.gz
s390x.deb		linux_i386.tar.gz
		linux_mips.tar.gz
		linux_mipsel.tar.gz
		linux_ppc64le.tar.gz
		linux_riscv64.tar.gz
		linux_s390x.tar.gz

[srebhan]

@izekr why opening a new PR? Anyway, the comment here on why this cannot be done in the infiniband plugin remains...

[izekr]

@izekr why opening a new PR? Anyway, the comment here on why this cannot be done in the infiniband plugin remains...

@srebhan,
Following your recommendations regarding infinibnad input plugin, I will update this PR to include InfiniBand hardware statistics (RDMA diagnostics) in the infinibnad input plugin.

Note
As for #16335,
I thought that I had some issues with #16335, and that's the reason why I closed it and opened #16336.

[srebhan]

Thanks for looking into merging the feature into the existing plugin!