Set up workflow for automated version increments in pull-requests

[HannesWell]

Set up for this repository the workflow for automated version increments in pull-requests added via eclipse-platform/eclipse.platform.releng.aggregator#2352

Before this can work complete, the EF infra team has to add the required PAT of the Platform-bot to this repo as described in the linked PR and requested in

• https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/5020#note_2825941

[github-actions]

Test Results

  660 files  ±0    660 suites  ±0   1h 13m 39s ⏱️ - 1m 9s
2 201 tests ±0  2 154 ✅ ±0   47 💤 ±0  0 ❌ ±0 
6 747 runs  ±0  6 604 ✅ ±0  143 💤 ±0  0 ❌ ±0 

Results for commit c994a27. ± Comparison against base commit ef8e043.

[HannesWell]

Before this can work complete, the EF infra team has to add the required PAT of the Platform-bot to this repo as described in the linked PR and requested in

* https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/5020#note_2825941

The PAT has been added via eclipse-equinox/.eclipsefdn#1, but the build failure has to be fixed first

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:3.1.0:run (copy-executable-natives) on project org.eclipse.equinox.executable:
An Ant BuildException has occured: /home/runner/work/equinox/equinox.binaries/org.eclipse.equinox.executable/bin does not exist.
[ERROR] around Ant part ...<copy todir="bin" includeEmptyDirs="false" failonerror="true" verbose="true">... @ 5:82 in /home/runner/work/equinox/equinox/features/org.eclipse.equinox.executable.feature/target/antrun/build-main.xml

With the current approach to run a expedited full build we actually also need the equinox.binaries repo checked out.
Have to think about a way to elegantly avoid that.