Fix dav properties column types

[tcitworld]

Summary

• First commit changes column propertyvalue from TEXT type to BLOB as it may contain null 0x00 characters because of php serialization DAV properties propertyvalue column has wrong column type #37754
  • after removing all serialized data (that have very good chances to be invalid)
  • by creating a new temporary column
  • moving data to it
  • dropping the old column
  • adding a new column with the right type
  • moving data to it
  • resetting not null on the new column
  • dropping the temporary column
• Second one increases simply propertypath column length Error reporting for too long filepaths (>255 chars) #9907

If changing the type of the column can't be done, we'll need to create a new column and move data

TODO

• SQLite is accepting pretty much anything ✅
• MySQL/MariaDB ✅ just needs the index to be on a prefix
• Test on PostgreSQL ❌ (needs some cast magic)
• Test on Oracle ❌ (is being Oracle)

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[tcitworld]

@skjnldsv This one is important and I need some help on the database migration.