Merge "Support built-in diff drivers for hunk header function names" into stable-6.10

....test/tst-rsrc/org/eclipse/jgit/test/resources/greeting.c

...-rsrc/org/eclipse/jgit/test/resources/greeting.javasource

...test/tst-rsrc/org/eclipse/jgit/test/resources/greeting.py

...test/tst-rsrc/org/eclipse/jgit/test/resources/greeting.rs

...test/tst-rsrc/org/eclipse/jgit/test/resources/sample.dtsi

...org/eclipse/jgit/diff/DiffFormatterBuiltInDriverTest.java

org.eclipse.jgit/.settings/.api_filters

org.eclipse.jgit/src/org/eclipse/jgit/diff/DiffDriver.java

...eclipse.jgit/src/org/eclipse/jgit/diff/DiffFormatter.java

....jgit/src/org/eclipse/jgit/diff/PatchIdDiffFormatter.java