RFR: 8301606: JFileChooser file chooser details view "size" label cut off in Metal Look&Feel [v2]

[Tejesh R]

> "size" label which is _RIGHT_ aligned is cut off on header cell. The issue is not only w.r.t to `JFileChooser` rather it is part of `JTable`. The root caused is found to be that in metal L&F the border insets is set to `(2,2,2,0)` meaning the right most inset value is 0. Hence when UIScaling increases the issue will be visible clearly. The fix addresses the issue by setting the right `inset` to 2 similar to other `inset` values. (Though the reason for setting it to 0 is unclear since it was initial load). 
> CI testing shows green.
> After the fix at 225% scaling:
> ![image](https://github.com/openjdk/jdk/assets/94159358/f3e5a88a-1710-4ee0-84aa-338bc93010b2)

Tejesh R has updated the pull request incrementally with one additional commit since the last revision:

  Automated test added

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Changes:
  - all: https://git.openjdk.org/jdk/pull/14464/files
  - new: https://git.openjdk.org/jdk/pull/14464/files/9103b080..85b2dfde

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14464&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14464&range=00-01

  Stats: 253 lines in 2 files changed: 114 ins; 139 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/14464.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14464/head:pull/14464

PR: https://git.openjdk.org/jdk/pull/14464