HADOOP-18658: upgrade snakeyaml to 2.0

[pjfanning]

Description of PR

https://issues.apache.org/jira/browse/HADOOP-18658

How was this patch tested?

CI build

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	1m 0s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+0 🆗	xmllint	0m 1s		xmllint was not available.
+0 🆗	shelldocs	0m 1s		Shelldocs was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+0 🆗	mvndep	15m 35s		Maven dependency ordering for branch
+1 💚	mvninstall	28m 43s		trunk passed
+1 💚	compile	25m 35s		trunk passed with JDK Ubuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1
+1 💚	compile	21m 55s		trunk passed with JDK Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09
+1 💚	mvnsite	27m 36s		trunk passed
+1 💚	javadoc	8m 30s		trunk passed with JDK Ubuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1
+1 💚	javadoc	7m 19s		trunk passed with JDK Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09
+1 💚	shadedclient	38m 6s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 26s		Maven dependency ordering for patch
+1 💚	mvninstall	25m 10s		the patch passed
+1 💚	compile	24m 40s		the patch passed with JDK Ubuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1
+1 💚	javac	24m 40s		the patch passed
+1 💚	compile	21m 51s		the patch passed with JDK Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09
+1 💚	javac	21m 51s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	21m 4s		the patch passed
+1 💚	shellcheck	0m 0s		No new issues.
+1 💚	javadoc	8m 11s		the patch passed with JDK Ubuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1
+1 💚	javadoc	7m 26s		the patch passed with JDK Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09
+1 💚	shadedclient	39m 2s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	736m 47s		root in the patch passed.
+1 💚	asflicense	1m 19s		The patch does not generate ASF License warnings.
		1032m 7s

Subsystem	Report/Notes
Docker	ClientAPI=1.42 ServerAPI=1.42 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5467/1/artifact/out/Dockerfile
GITHUB PR	#5467
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient codespell detsecrets xmllint shellcheck shelldocs
uname	Linux 573d74388f1f 4.15.0-200-generic #211-Ubuntu SMP Thu Nov 24 18:16:04 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 742730f
Default Java	Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.18+10-post-Ubuntu-0ubuntu120.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_362-8u362-ga-0ubuntu1~20.04.1-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5467/1/testReport/
Max. process+thread count	3135 (vs. ulimit of 5500)
modules	C: hadoop-project . U: .
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5467/1/console
versions	git=2.25.1 maven=3.6.3 shellcheck=0.7.0
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[ayushtkn]

LGTM