feat(inputs.kube_inventory): Support using kubelet to get pods data

[Noy-Simon]

• Updated associated README.md.
• Wrote appropriate unit tests.
• Pull request title or commits are in conventional commit format

resolves #13878
superseeds #13893

Add an option to get pods info using Kubelet to avoid high loads on the API server on large clusters

[srebhan]

Thanks for the nice feature @Noy-Simon! Some comments in the code...

[srebhan]

Just one simplification, otherwise the code looks good. Thanks @Noy-Simon!

[srebhan]

Thanks for your contribution @Noy-Simon!

[powersj]

@Noy-Simon - I merged your other PR now we have conflicts, can you rebase this on master to get a fix for Windows CI and resolve the conflicts? Then I can merge this!

Thanks

[telegraf-tiger]

Download PR build artifacts for linux_amd64.tar.gz, darwin_amd64.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

[Noy-Simon]

Hey @powersj i fixed the conflicts but it looks like the test integration fails in all of the branches

[powersj]

it looks like the test integration fails in all of the branches

That's fine I have #14051 to fix that.