feat: add option to disable prepared statements for PostgreSQL

[akrantz01]

Required for all PRs:

• Updated associated README.md.
• Wrote appropriate unit tests.
• Pull request title or commits are in conventional commit format (e.g. feat: or fix:)

resolves #9630

This adds an option for disabling the use of prepared statements in the postgresql and postgresql_extensible inputs. It also prevents changing the IsPgBouncer flag from the configuration which was previously possible.

[telegraf-tiger]

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• freebsd_armv7.tar.gz

• linux_armhf.tar.gz

• armhf.deb

• armel.rpm

• linux_armel.tar.gz

• armel.deb

• i386.rpm

• freebsd_i386.tar.gz

• linux_i386.tar.gz

• i386.deb

• s390x.rpm

• linux_s390x.tar.gz

• s390x.deb

• aarch64.rpm

• linux_arm64.tar.gz

• arm64.deb

• ppc64le.rpm

• linux_ppc64le.tar.gz

• ppc64el.deb

• x86_64.rpm

• freebsd_amd64.tar.gz

• linux_amd64.tar.gz

• amd64.deb

• linux_mips.tar.gz

• mips.deb

• linux_mipsel.tar.gz

• mipsel.deb

• windows_amd64.zip

• windows_i386.zip

[srebhan]

@akrantz01 any update on this PR?

[akrantz01]

@srebhan I think it should be ready to be merged once CI passes.

[srebhan]

@akrantz01 thanks for the rebase, but I think you missed some of @sspaink 's comments.

[akrantz01]

Whoops, I must've thought I had already addressed those. I think it should now actually be ready.

[srebhan]

Hey @akrantz01, thanks for the update. Found three very minor things but I guess afterwards we are good to go...

[srebhan]

@akrantz01 can you please make fmt? :-)

[telegraf-tiger]

☺️ This pull request doesn't significantly change the Telegraf binary size (less than 1%)

📦 Looks like new artifacts were built from this PR.

Expand this list to get them here ! 🐯

Artifact URLs

DEB	RPM	TAR GZ	ZIP
amd64.deb	aarch64.rpm	darwin_amd64.tar.gz	windows_amd64.zip
arm64.deb	armel.rpm	freebsd_amd64.tar.gz	windows_i386.zip
armel.deb	armv6hl.rpm	freebsd_armv7.tar.gz
armhf.deb	i386.rpm	freebsd_i386.tar.gz
i386.deb	ppc64le.rpm	linux_amd64.tar.gz
mips.deb	s390x.rpm	linux_arm64.tar.gz
mipsel.deb	x86_64.rpm	linux_armel.tar.gz
ppc64el.deb		linux_armhf.tar.gz
s390x.deb		linux_i386.tar.gz
		linux_mips.tar.gz
		linux_mipsel.tar.gz
		linux_ppc64le.tar.gz
		linux_s390x.tar.gz
		static_linux_amd64.tar.gz

[srebhan]

Looks good to me. Thanks @akrantz01 for bringing this PR over the finish-line.