fix(outputs.stackdriver): Drop metrics on InvalidArgument gRPC error

[powersj]

Rather than rely on specific error messages that have in fact changed over time, let's instead drop metrics whenever we get an InvalidArgument gRPC error. These are not retry-able errors and should instead be dropped.

fixes: #13826

[srebhan]

Thanks for the fix @powersj! One question about testing, can we somehow mock an "invalid argument" response by mimicking the GRPC server? I'm fine with merging it as-is but more testing is better IMO. ;-)

[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
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