MDEV-14373: Reject incompatible PLUGIN_xxx build mode at configure time

[FaramosCZ]

When a user sets -DPLUGIN_PARTITION=DYNAMIC or
-DPLUGIN_PERFSCHEMA=DYNAMIC, these plugins are declared STATIC_ONLY in their CMakeLists.txt. Previously, the MYSQL_ADD_PLUGIN macro would silently skip building such plugins: the STATIC branch wouldn't match (because the user requested DYNAMIC), and the DYNAMIC branch would be blocked by ARG_STATIC_ONLY. The plugin was simply not built.

This caused confusing downstream compile errors in other plugins that depended on the missing one:

• PLUGIN_PARTITION=DYNAMIC -> CONNECT fails: 'struct TABLE_SHARE' has no member named 'partition_info_str_len' 'struct TABLE' has no member named 'part_info'

• PLUGIN_PERFSCHEMA=DYNAMIC -> MariaBackup fails: 'MY_WME' was not declared in this scope 'my_read' was not declared in this scope 'MY_FILE_ERROR' was not declared in this scope

• PLUGIN_ARIA=DYNAMIC -> Spider fails: 'MARIA_COLUMNDEF' has not been declared (Note: Aria is now MANDATORY and already overrides user input; this was likely reproducible in older versions where Aria was DEFAULT)

Root cause: The MYSQL_ADD_PLUGIN macro in
cmake/plugin.cmake did not validate that the
user-requested build mode (STATIC or DYNAMIC) was
compatible with the plugin's declared capabilities (STATIC_ONLY or MODULE_ONLY).

Fix: Add validation immediately after the existing PLUGIN_xxx value check. If DYNAMIC is requested for a STATIC_ONLY plugin, or STATIC is requested for a
MODULE_ONLY plugin, emit a FATAL_ERROR with a clear message telling the user which option to use instead.

Affected plugins with STATIC_ONLY:

• partition (sql/CMakeLists.txt)
• perfschema (storage/perfschema/CMakeLists.txt)
• sql_sequence (sql/CMakeLists.txt)
• online_alter_log (sql/CMakeLists.txt)

Affected plugins with MODULE_ONLY:

• federated (storage/federated/CMakeLists.txt)
• example (storage/example/CMakeLists.txt)
• rocksdb (storage/rocksdb/CMakeLists.txt)

The YES and AUTO modes are unaffected since they already gracefully fall through to whichever mode the plugin supports.