feat(inputs.temp): Add setting to force thermal-zones gathering on linux

[01110111000001]

Summary

• When the hardware device is sleeping, the temp input plugin completely hangs waiting for the os.ReadFile call to return.
  The EAGAIN returned by the kernel is handled internally by os.ReadFile and the function waits for the file to become available.
  -> Use the non-blocking syscall function to read the files and silently ignoring unavailable thermal-zones. moved to its own PR, see fix(input.temp): Ignore EAGAIN on unavailable thermal-zones #18913

• Adding a parameter to force the gathering of the thermal-zones temperatures. Some systems combine both hwmon and thermal-zones. Current implemenentation ignores thermal-zones when some hwmon exist.

Some comments/potential issues

1. No tests were previously implemented for the thermal-zones gathering. Are they needed ?
2. Should I convert the new boolean parameter to a string (like prefered in the docs), at the expense of more code changes?
3. technically these are two distinct features, should I open 2 PRs? the fix moved to its own PR, see fix(input.temp): Ignore EAGAIN on unavailable thermal-zones #18913

Looking forward to your feedback and your thoughts on the potential issues.
Thanks for your great work on this tool!

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

partially resolves #18899
related to #18913

[srebhan]

Thanks for your contribution @01110111000001! Can we please split the PR into two, a first PR fixing the blocking read (i.e. marking it as a fix) and a second PR adding the option to force reading from thermal zones?

[01110111000001]

Yes! See #18913 for the PR implementing the fix.
I modified this PR to only include the new option, tell me if its okay.

[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.

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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]

Nice! Thanks @01110111000001 for your contribution!

[skartikey]

@01110111000001 Thanks for the contribution!