[FEATURE] Create mapping of directfs accesses into UC tables

[dipankarkush-db]

After we have DirectFS accesses detected in the assessment or migration-progress workflows,

• create databricks labs ucx create-directfs-mapping
• design: table-mapping.csv vs directfs-mapping.csv files
• default logic for schema/table naming

[nfx]

cc @zpappa

[pohlposition]

depends upon mount-point mapping state