[#1269] Prepare releng for 2.11.0 release

[ruspl-afed]

• update version for pom.xml manifests
• update version for MANIFEST.MF manifests
• update version for feature.xml manifests
• update version for product manifests
• update version for p2.inf manifests
• update version for public keys
• update about.properties
• update bundle.properties
• update plugin.properties
• update feature.properties

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (0411892) 33.44% compared to head (e986e11) 33.42%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1270 +/- ## ============================================ - Coverage 33.44% 33.42% -0.02% Complexity 359 359 ============================================ Files 1175 1175 Lines 25741 25741 Branches 1589 1589 ============================================ - Hits 8608 8603 -5 - Misses 16612 16617 +5 Partials 521 521 ```

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