feat(processors.enum): Allow mapping to be applied to multiple fields

[mstrandboge]

Summary

Adds a new fields option to the enum processor, deprecating the old field option. Allows mapping multiple fields with one enum mapping when a glob does not work

Checklist

• [X] No AI generated code was used in this PR

Related issues

resolves #10892

[Hipska]

Why don't we also make this change for tags at the same time as well?

[Hipska]

I also think the previous behaviour is changed:

[[inputs.mock]]
  metric_name = "mock"

  [[inputs.mock.constant]]
   name = "status"
   value = "green"

  [[inputs.mock.constant]]
   name = "status_reverse"
   value = "green"


[[processors.enum]]

  [[processors.enum.mapping]]
    field = "status"

    [processors.enum.mapping.value_mappings]
      green = 1
      amber = 2
      red = 3

  [[processors.enum.mapping]]
    field = "status_reverse"

    [processors.enum.mapping.value_mappings]
      green = 3
      amber = 2
      red = 1

Currently results in:

- > mock status="green",status_reverse="green"
+ > mock status=1i,status_reverse=3i

And I think with this PR, it will result in mock status=1i,status_reverse=1i.

[srebhan]

@DStrand1 could you please test @Hipska's example (and ideally add it as a unit-test)!?

[Hipska]

@DStrand1 do you have any update?

[telegraf-tiger[bot]]

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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