fix(processors.starlark): Use tracking ID to identify tracking metrics

[srebhan]

Summary

To handle tracking-metrics correctly in the starlark processor, we need to identify tracking metrics and if they are "swallowed" by the processor.
Currently this process is based on comparing the returned metric hash-ID with the one if the input metric. However, this is fragile because the the hash-ID changes as soon as the metric is modified (e.g. renamed, tags are added/removed or tag-values are modified). As this is a very common use-case of the starlark processor, the present PR used the tracking-ID to identify returned tracking metrics. The PR furthermore adds some more unit-tests for stateful processing scripts.

Checklist

• No AI generated code was used in this PR

Related issues

resolves #14484

[telegraf-tiger]

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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