Transition from jpackager to jpackage

[sbesson]

The current build system uses the omero-javapackager-plugin Gradle plugin for the commands allowing to package OMERO.insight as Window msi files or OS X dmg files. This packaging step is only executed in GitHub workflows on tag

omero-insight/.github/workflows/gradle.yml

Lines 45 to 64 in 050a7ae

	- name: Build insight exe
	if: startsWith(matrix.os, 'windows') && startsWith(github.ref, 'refs/tags') && startsWith(matrix.java, '11')
	shell: cmd
	run: |
	gradle packageApplicationExe
	- name: Build importer exe
	if: startsWith(matrix.os, 'windows') && startsWith(github.ref, 'refs/tags') && startsWith(matrix.java, '11')
	shell: cmd
	run: |
	gradle packageImporterApplicationExe
	- name: Build insight msi
	if: startsWith(matrix.os, 'windows') && startsWith(github.ref, 'refs/tags') && startsWith(matrix.java, '11')
	shell: cmd
	run: |
	gradle packageApplicationMsi
	- name: Build importer msi
	if: startsWith(matrix.os, 'windows') && startsWith(github.ref, 'refs/tags') && startsWith(matrix.java, '11')
	shell: cmd
	run: |
	gradle packageImporterApplicationMsi

Internally, the plugin relies on the javapackager utility which has been removed from the JDK after Java 8.

As part of #461, the build system was updated to require Java 11 as the minimal requirement. This prevents the release of packaged application with the current infrastructure.

An option to unblock the release would be to transition the build system to require Java 17 as the minimum build requirement and use the jpackage utility. We have successfully used for the packaging of the NGFF-Converter application.

A requirement will be to upgrade the Gradle build system to at least 7.3.x - see https://docs.gradle.org/current/userguide/compatibility.html. We might use the opportunity to upgrade to Gradle 9 and support building on 17, 21 and 25