fix: Remove verbose logging from disk input plugin

[reimda]

fixes #10514

[srebhan]

Hey @reimda thanks for looking into this!
I would love to see set becoming an internal package as it is helpful in many places/plugins. Furthermore, we maybe should limit the error messages to be printed only once? We can use the set again or remove the erroneous mountpoints from the set of processed ones...
What do you think?

[srebhan]

@reimda there are some tests failing and they seem to be related... Can you please take a look?

[srebhan]

@reimda any chance you take a look at the tests?

[reimda]

I'm struggling to find how this change causes the failures. I can reproduce them locally but I haven't gotten to the bottom of them yet. Still working on it!

[telegraf-tiger]

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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_i386.zip
armel.deb	armv6hl.rpm	freebsd_amd64.tar.gz
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
		static_linux_amd64.tar.gz

[srebhan]

Looks good to me. Thanks @reimda!