Use Enable-Native-Access manifest attribute for FFM

[sbordet]

Jetty version(s) 12.0.9+

Java version/vendor (use: java -version) 22+

Description Currently, use of the Jetty module to access Quiche via FFM requires --enable-native-access to be specified on the command line, and in the POM files for testing.

However, it should be possible to use the Enable-Native-Access manifest attribute to achieve the same, and avoid specifying the command line option, which is easier because it does not require any additional configuration.

Investigate if this is possible, and if so, update the *.jar generation and the POM configuration.