[jfx23u] RFR: 8336798: DRT test cssrounding.html test for linear layout fails with WebKit 619.1

[Jay Bhaskar]

A clean backport to jfx23u. The fix is for DRT test cssrounding.html test fails due to 1px extra height. The test passes with the fix and fails without fix.

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Commit messages:
 - Backport 06ac16789f071ec6aca55697c139789ca3218c0d

Changes: https://git.openjdk.org/jfx23u/pull/5/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx23u&pr=5&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8336798
  Stats: 173 lines in 2 files changed: 172 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx23u/pull/5.diff
  Fetch: git fetch https://git.openjdk.org/jfx23u.git pull/5/head:pull/5

PR: https://git.openjdk.org/jfx23u/pull/5