Fix pnpm lockfile and deprecated 'shamefully-hoist' configuration

[manolo]

The Vaadin build process is failing due to a mismatch in the 'overrides' configuration in the pnpm lockfile and the use of the deprecated 'shamefully-hoist' option. Steps to reproduce:

1. Run the build process.
2. Observe the error logs showing 'ERR_PNPM_LOCKFILE_CONFIG_MISMATCH' and warnings about 'shamefully-hoist'.

Proposed solution:

• Regenerate the pnpm lockfile.
• Remove or update the 'shamefully-hoist' option in the configuration.
• Validate the fix by testing the build process.

This issue affects version 25.1.0-alpha8.