Issue 2005 import spy adapter

[amelodev]

Fixes #2005

org.eclipse.pde.spy.adapter bundle added to the PDE spies collection.
This new spy provides a view of the available adapter factories.

There is one issue I have not been able to resolve yet — the Adapter Spy shortcut does not seem to work.

This problem also appears to affect other spies such as the Event Spy and the Context Spy.

[github-actions]

Test Results

   771 files  +  148     771 suites  +148   58m 18s ⏱️ + 4m 45s
 3 648 tests ±    0   3 594 ✅ +    2   54 💤 ± 0  0 ❌  - 2 
10 878 runs  +2 665  10 715 ✅ +2 643  163 💤 +24  0 ❌  - 2 

Results for commit 192d9ab. ± Comparison against base commit 1c1d663.