RFR: JDK-8325690: The scrollable element <div> with non-interactive content is not tabbable

[psoujany]

The scrollable element `<div>` with non-interactive content is not tabbable. Grid columns in the javadoc stylesheet has overflow: auto, which is failing Accessibility checks.
https://bugs.openjdk.org/browse/JDK-8325690

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Commit messages:
 - Remove overflow on grid columns
 - Remove overflow on grid columns

Changes: https://git.openjdk.org/jdk/pull/17819/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17819&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325690
  Stats: 2 lines in 2 files changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17819.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17819/head:pull/17819

PR: https://git.openjdk.org/jdk/pull/17819