Get rid of p2 tests reconciler product

[akurtakov]

Configuring tycho surefire with all the deps needed should be achievable via other less expensive means.

[github-actions]

Test Results

    6 files   -   3      6 suites   - 3   12m 47s ⏱️ - 18m 24s
2 067 tests  - 116  2 026 ✅  - 153  1 💤  - 3   40 ❌ + 40 
6 291 runs   - 348  6 132 ✅  - 496  2 💤  - 9  157 ❌ +157 

For more details on these failures, see this check.

Results for commit 19d6c2a. ± Comparison against base commit a312f47.

This pull request removes 116 tests.

org.eclipse.equinox.p2.tests.importexport.ImportExportRemoteTests ‑ Unknown test
org.eclipse.equinox.p2.tests.importexport.ImportExportTests ‑ testAllowExportFeaturesInstalledFromLocal
org.eclipse.equinox.p2.tests.importexport.ImportExportTests ‑ testExportFeaturesInstalledFromLocal
org.eclipse.equinox.p2.tests.importexport.ImportExportTests ‑ testIncompatibleP2f
org.eclipse.equinox.p2.tests.importexport.ImportExportTests ‑ testLoadP2f
org.eclipse.equinox.p2.tests.importexport.ImportExportTests ‑ testLoadUnknownP2f
org.eclipse.equinox.p2.tests.ui.actions.ElementUtilsTest ‑ testElements
org.eclipse.equinox.p2.tests.ui.actions.ElementUtilsTest ‑ testEmpty
org.eclipse.equinox.p2.tests.ui.actions.ElementUtilsTest ‑ testIUs
org.eclipse.equinox.p2.tests.ui.actions.ElementUtilsTest ‑ testInvalid
…

[laeubi]

@akurtakov see

• Remove the reconciler product #458