This commit implements automatic phase name upgrades when upgrading
Maven projects from model version 4.0.0 to 4.1.0. The deprecated
Maven 3 phase names are automatically converted to their Maven 4
equivalents:

- pre-clean → before:clean
- post-clean → after:clean
- pre-integration-test → before:integration-test
- post-integration-test → after:integration-test
- pre-site → before:site
- post-site → after:site

The upgrade functionality:
- Only applies when upgrading to model version 4.1.0 or higher
- Processes all plugin executions in build/plugins, build/pluginManagement,
  and profile/build/plugins sections
- Preserves non-deprecated phase names unchanged
- Includes comprehensive test coverage for all scenarios

This enhancement ensures that Maven projects upgrading to 4.1.0 will
automatically have their deprecated phase references updated to use
the new Maven 4 phase naming convention.

(cherry picked from commit 3660924)