8364404: Test "java/awt/Panel/PanelRepaint/PanelRepaint.java" failed because the rows is rendered exceeds the horizontal scrollbar boundary

[jyothilek]

Fix for JDK-JDK-8364404

TestCommand: jdk-17.0.20.jdk/Contents/Home/bin/java -jar jtreg/lib/jtreg.jar -verbose:summary -w Resulst/JTwork -r Results/JTreport -jdk jdk-28 jdk/open/test/jdk/java/awt/Panel/PanelRepaint/PanelRepaint.java

Platforms Tested: Windows 11, MacOS, Linux, Ubuntu

Summary: Updated PanelRepaint to use BorderLayout for the test frame and its main panel instead of relying on FlowLayout with manually assigned bounds.

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Integration blocker

 ⚠️ Failed to retrieve information on issue 8364404. Please make sure it exists and is accessible.

Issue

• ⚠️ Failed to retrieve information on issue 8364404.

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[sendaoYan]

8364404 is not a jvm bug but a test bug, so this line chnage seems do not needed

[jyothilek]

Change is committed