YARN-11912: Suppress Spotbugs warnings introduced in recent trunk changes

[cnauroth]

Description of PR

Suppress Spotbugs warnings introduced in recent trunk changes

1. There was a pre-existing exclusion of a potential NPE warning in ResourceLocalizationService. HADOOP-19670. Replace Thread with SubjectPreservingThread to restore pre JDK22 Subject behaviour in Threads #8062 changed the relevant method from run() to work(), so the exclusion needs a corresponding change to match.
2. The Spotbugs upgrade triggered numerous new warnings. HADOOP-19731. Fix SpotBugs warnings introduced after SpotBugs version upgrade. #8053 was intended to update exclusions to cover these new warnings. I think that just missed a thread synchronization warning in ResourceManager.

How was this patch tested?

1. Run mvn -o test-compile spotbugs:spotbugs -DskipTests locally.
2. Confirm the warnings are no longer present in hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/target/spotbugs.xml.

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?

[cnauroth]

@zhtttylz or @slfan1989 , can I please you get your review? Thank you.

[cnauroth]

#8038 has a sample CI run showing these Spotbugs warnings.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	1m 9s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+0 🆗	xmllint	0m 0s		xmllint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	shadedclient	36m 8s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	shadedclient	30m 25s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 35s		The patch does not generate ASF License warnings.
		70m 28s

Subsystem	Report/Notes
Docker	ClientAPI=1.52 ServerAPI=1.52 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8143/2/artifact/out/Dockerfile
GITHUB PR	#8143
Optional Tests	dupname asflicense codespell detsecrets xmllint
uname	Linux 2583bd3742e0 5.15.0-160-generic #170-Ubuntu SMP Wed Oct 1 10:06:56 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 303e44b
Max. process+thread count	613 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8143/2/console
versions	git=2.25.1 maven=3.9.11
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	17m 9s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+0 🆗	xmllint	0m 0s		xmllint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	shadedclient	31m 41s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	shadedclient	26m 45s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 33s		The patch does not generate ASF License warnings.
		82m 49s

Subsystem	Report/Notes
Docker	ClientAPI=1.52 ServerAPI=1.52 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8143/1/artifact/out/Dockerfile
GITHUB PR	#8143
Optional Tests	dupname asflicense codespell detsecrets xmllint
uname	Linux 8ac4c9f4e8f0 5.15.0-160-generic #170-Ubuntu SMP Wed Oct 1 10:06:56 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 303e44b
Max. process+thread count	637 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8143/1/console
versions	git=2.25.1 maven=3.9.11
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.

[zhtttylz]

LGTM, +1. Thanks!

[slfan1989]

LGTM +1.

[cnauroth]

@zhtttylz and @slfan1989 , thank you for the reviews. I committed this to trunk.