Changes

Use final release URL of Eclipse RAP + Platform

Update RAP Tools version to 3.26.0

Create additional self-contained p2 repository

This additional p2 repository is created during build time for each
build and can be used to develop RAP Tools in the IDE with the very same
target bundles like they are used in the regular build.

Update build configuration for RAP Tools 3.26.0 M1

- Use Eclipse Platform 4.29 I20230705-1800

Update build configuration for RAP Tools 3.26.0 M2

- Use Eclipse Platform 4.29 I20230726-1800
- Use restructured Eclipse Orbit 2023-09
  - Update bundle symbolic name javax.annotation to jakarta.annotation-api

Update build configuration for RAP Tools 3.26.0 M3

- Use Eclipse Platform 4.29 I20230817-0230

Remove not really provided osgi.extender;osgi.serviceloader capabilities

Instead rely on the Service Loader Mediator Implementation contained in
the Eclipse SDK/TLP repository.

The 'virtual' capabilities where introduced in commit
'''
Upgrade to Jetty 10.0.3
Commit-Id: f2d112052549bf03f73fe493f46a7cffde3405f0
Change-Id: I18898d403268a0b18a1d71f4b795e8e3802ecc7d
'''

and

'''
Work around p2 / OSGi capability requirements issues in Jetty
Commit-Id: 6aeaf418a5a0a17f9cc15599dde926e05adeb437
Change-Id: I26e7c5db00807fcc73eae4e4aff2fb0b6f56f4b9
'''

Also remove the only virtually provided capability
osgi.serviceloader;osgi.serviceloader="org.eclipse.jetty.webapp.Configuration",
which is provided by org.eclipse.jetty.webapp since version 10.0.6. Also
lift the lower bound of the requirement to it to simplify gathering all
dependencies.

Change-Id: I432edcd91edcb8c788b5bbb0b95ec94cca1c3a1a

Switch to new Jakarta annotation API bundle in e4 template

The e4 RAP project template uses the `javax.annotation` packages which
used to be provided by a bundle with the same bundle symbolic name. With
the new release the very same namespace has been renamed and is now
provided by a bundle `jakarta.annotation-api`.

Update the launch configuration, and the wizard that creates the
MANIFEST.MF file.

Also add and update missing bundles to all created launch
configurations.

Update build configuration for RAP Tools 3.26.0 RC1

- Use Eclipse Platform 4.29 I20230824-0400

Update build configuration for RAP Tools 3.26.0 RC2

- Use Eclipse Platform 4.29 I20230903-1000

Update target definition files to 3.26 RC2-prerelease