HBASE-27257 Remove unnecessary usage of CachedBlocksByFile from RS UI

[bbeaudreault]

I kept around the old warning, but moved it to near the "View as Json" links, since that's where it makes sense now.

Here's how it looks on one of my prod regionservers:

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 32s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	hbaseanti	0m 0s	Patch does not have any anti-patterns.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ master Compile Tests _
+1 💚	mvninstall	2m 25s	master passed
+1 💚	compile	2m 13s	master passed
+1 💚	checkstyle	0m 29s	master passed
+1 💚	spotless	0m 42s	branch has no errors when running spotless:check.
+1 💚	spotbugs	1m 14s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 9s	the patch passed
+1 💚	compile	2m 11s	the patch passed
+1 💚	javac	2m 11s	the patch passed
+1 💚	checkstyle	0m 27s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	hadoopcheck	11m 39s	Patch does not cause any errors with Hadoop 3.1.2 3.2.2 3.3.1.
+1 💚	spotless	0m 40s	patch has no errors when running spotless:check.
+1 💚	spotbugs	1m 18s	the patch passed
		_ Other Tests _
+1 💚	asflicense	0m 9s	The patch does not generate ASF License warnings.
		31m 22s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#4667
Optional Tests	dupname asflicense javac spotless spotbugs hadoopcheck hbaseanti checkstyle compile
uname	Linux 98fc6a1371e1 5.4.0-1081-aws #88~18.04.1-Ubuntu SMP Thu Jun 23 16:29:17 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 811f0e7
Default Java	AdoptOpenJDK-1.8.0_282-b08
Max. process+thread count	64 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/console
versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 4s	Docker mode activated.
-0 ⚠️	yetus	0m 2s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	2m 48s	master passed
+1 💚	compile	0m 51s	master passed
+1 💚	shadedjars	3m 50s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 29s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 36s	the patch passed
+1 💚	compile	0m 48s	the patch passed
+1 💚	javac	0m 48s	the patch passed
+1 💚	shadedjars	3m 45s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 26s	the patch passed
		_ Other Tests _
+1 💚	unit	206m 47s	hbase-server in the patch passed.
		225m 35s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#4667
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 29f05e2e5d39 5.4.0-122-generic #138-Ubuntu SMP Wed Jun 22 15:00:31 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 811f0e7
Default Java	AdoptOpenJDK-11.0.10+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/testReport/
Max. process+thread count	2460 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/console
versions	git=2.17.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 10s	Docker mode activated.
-0 ⚠️	yetus	0m 2s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	2m 35s	master passed
+1 💚	compile	0m 39s	master passed
+1 💚	shadedjars	3m 44s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 26s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 19s	the patch passed
+1 💚	compile	0m 40s	the patch passed
+1 💚	javac	0m 40s	the patch passed
+1 💚	shadedjars	3m 45s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 24s	the patch passed
		_ Other Tests _
+1 💚	unit	209m 56s	hbase-server in the patch passed.
		227m 19s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
GITHUB PR	#4667
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux abce9df78dce 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15 20:00:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 811f0e7
Default Java	AdoptOpenJDK-1.8.0_282-b08
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/testReport/
Max. process+thread count	2425 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4667/1/console
versions	git=2.17.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

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