fix(inputs.turbostat): Allow floating point intervals

[NiccoloTosato]

Summary

Interval < 1s

Since turbostat supports intervals smaller than 1s, I've fixed the error that arises in case of intervals less than 1s, which results in truncating every interval to 0. Moreover, I've converted the interval into floating-point seconds, which now correctly affects the sampling of turbostat.

Checklist

• No AI generated code was used in this PR
• AI generated code used in this PR follows the InfluxData Policy on AI-Generated Code Contributions

Related issues

resolves #17957

[srebhan]

Thanks a lot @NiccoloTosato!

[telegraf-tiger]

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Downloads for additional architectures and packages are available below.

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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

[skartikey]

@NiccoloTosato Thanks for the contribution!