fix: bump @btst/adapter-memory to ^2.2.2 in codegen projects

The codegen E2E projects pinned ^2.1.1, which the lockfile resolved to
2.2.1 (@better-auth/core 1.6.2). With @btst/stack now on @btst/db 2.2.2
(@better-auth/core 1.6.16), the two coexisting core versions caused a
DBAdapter type mismatch (missing consumeOne) during next build.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: olliethedev