fix(logging): Add Close() func for redirectLogger

[zmyzheng]

Summary

Telegraf provides the function RedirectLogging(w io.Writer) which allows the user to optionally redirect the log to a customized sink by wrapping the instance.impl as a redirectLogger. In this case, when the user tries to close this sink by calling logger.CloseLogging() func (which internally calls handler.close()), the sink closing will not take effect because redirectLogger is not an io.Closer, while the handler only do the close after checking it is an io.Closer. This PR fixes this issue by implementing the Close() function for redirectLogger to make it as an io.Closer().

This issue only happens when redirectLogger is used. In comparion, other sink interface implementations (like textLogger and structuredLogger don't have this issue as both of them have already implemented the Close() function.

Checklist

• No AI generated code was used in this PR

Related issues

resolves #16218

[telegraf-tiger]

Download PR build artifacts for linux_amd64.tar.gz, darwin_arm64.tar.gz, and windows_amd64.zip.
Downloads for additional architectures and packages are available below.

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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

[DStrand1]

Thanks for the PR!

[srebhan]

Thanks for your contribution @zmyzheng!