ER_TABLESPACE_MISSING
Issue:
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wl#14008 has introduced INNODB_VALIDATE_TABLESPACE_PATHS configuration
in Innodb to skip scanning all tablespace files at startup. This allows
the fil_space_t objects to be loaded when a table/tablespace is used
first time. Clone regards fil_space_t cache as the source of truth for
the tablespaces to be cloned and fails to clone the unloaded spaces when
INNODB_VALIDATE_TABLESPACE_PATHS=OFF.

Solution:
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Before clone make sure all space objects are loaded by scanning DD.

Reviewed-by: Mayank Prasad <mayank.prasad@oracle.com>

RB: 25748