fix(outputs.graphite): add custom regex to outputs

[powersj]

Missed adding this correctly to the graphite output, only the parser in a previous PR.

fixes: #12832

[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_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]

LGTM.

One more comment...

[srebhan]

Shouldn't the new option also appear in the README?

[Hipska]

It already is:

telegraf/plugins/outputs/graphite/sample.conf

Lines 13 to 19 in eb0ab93

	## Strict sanitization regex
	## This is the default sanitization regex that is used on data passed to the
	## graphite serializer. Users can add additional characters here if required.
	## Be aware that the characters, '/' '@' '*' are always replaced with '_',
	## '..' is replaced with '.', and '\' is removed even if added to the
	## following regex.
	# graphite_strict_sanitize_regex = '[^a-zA-Z0-9-:._=\p{L}]'

[srebhan]

I see. Thanks for checking @Hipska! LGTM then.