fix(mongodb): change command based on server version

[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 #9622

Fixes a bug where gathering the pool statistics for a MongoDB server running version 5.0.0 or greater would fail since the command was renamed from shardConnPoolStats to connPoolStats. This was fixed by changing command run based on the version of the server reported from serverStatus.

[sspaink]

Thanks for fixing this! Maybe the README.md should also be updated to show what versions are supported?

[akrantz01]

Oh yea, that'd be a good idea.

[telegraf-tiger]

Looks like new artifacts were built from this PR. Get them here!

Artifact URLs

• darwin_amd64.tar.gz

• windows_amd64.zip

• windows_i386.zip

• linux_mipsel.tar.gz

• mipsel.deb

• i386.rpm

• freebsd_i386.tar.gz

• linux_i386.tar.gz

• i386.deb

• s390x.rpm

• linux_s390x.tar.gz

• s390x.deb

• linux_mips.tar.gz

• mips.deb

• x86_64.rpm

• freebsd_amd64.tar.gz

• linux_amd64.tar.gz

• amd64.deb

• static_linux_amd64.tar.gz

• armel.rpm

• linux_armel.tar.gz

• armel.deb

• armv6hl.rpm

• freebsd_armv7.tar.gz

• linux_armhf.tar.gz

• armhf.deb

• aarch64.rpm

• linux_arm64.tar.gz

• arm64.deb

• ppc64le.rpm

• linux_ppc64le.tar.gz

• ppc64el.deb