RFR: 6292135: DefaultTableModel.setColumnIdentifiers() Clears JTable Row Heights

[Prasanta Sadhukhan]

Calling `DefaultTableModel.setColumnIdentifiers()` resizes the row height of the table to default row height (16) even if the row height is changed to something other than the default using J`Table.setRowHeight(row, height). `
The spec of `DefaultTableModel.setColumnIdentifiers()` https://docs.oracle.com/en/java/javase/24/docs/api/java.desktop/javax/swing/table/DefaultTableModel.html#setColumnIdentifiers(java.lang.Object[]) says that it
`replaces the column identifiers in the model`, that is, the header field of the column is changed to the passed identifier and nowhere it is mentioned that row height would be changed.

The issue happens because calling `DefaultTableModel.setColumnIdentifiers()` results in the firing of a `TableModelEvent` with HEADER_ROW event and JTable resets the `rowModel` for it irrespective of what the event is.
Fix is to not reset the `rowModel` to keep the set rowHeight intact for HEADER_ROW event

No other issue observed with CI with this fix..

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Commit messages:
 - jcheck
 - JDK-6292135:DefaultTableModel.setColumnIdentifiers() Clears JTable Row Heights

Changes: https://git.openjdk.org/jdk/pull/28529/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28529&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-6292135
  Stats: 101 lines in 2 files changed: 99 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28529.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28529/head:pull/28529

PR: https://git.openjdk.org/jdk/pull/28529