RFR: JDK-8299052 : ViewportOverlapping test fails intermittently on Win10 & Win11 [v5]

[Harshitha Onkar]

> ViewportOverlapping test was failing intermittently during CI runs on Win10 and Win11. 
> 
> Although this intermittent issue wasn't replicable when the individual test as well as the test group was run multiple times. Hence screenshot capture has been at various points in the test to aid debugging this intermittent issue, in case it should occur again. 
> 
> PS: Only relevant code in OverlappingTestBase has been cleaned-up as required by this test. There are other parts of the base class that require code clean-up  which is best if taken up as a separate issue as it has common code across many AWT_Mixing tests.

Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision:

  review changes to screen capture

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14289/files
  - new: https://git.openjdk.org/jdk/pull/14289/files/86454670..5b1abfa7

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14289&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14289&range=03-04

  Stats: 9 lines in 1 file changed: 0 ins; 0 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/14289.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14289/head:pull/14289

PR: https://git.openjdk.org/jdk/pull/14289