Counter updates break under tablet migration (#18180), and for this reason counters need to be disabled until the problem is fixed. It's enough to forbid creating a table with counters, as altering a table without counters already cannot result in the table having counters:
1) Adding a counter column to a table without counters:
```
cqlsh> ALTER TABLE temp.cf ADD (col_name counter);
ConfigurationException: Cannot add a counter column (col_name) in a non counter column family
```
2) Altering a column to be of the counter type:
```
cqlsh> ALTER TABLE temp.cf ALTER col_name TYPE counter;
ConfigurationException: Cannot change col_name from type int to type counter: types are incompatible.
```
Fixes: #19449
Fixes: https://github.com/scylladb/scylladb/issues/18876
Need to backport to 6.0, as this is broken there.
Closesscylladb/scylladb#19518
* github.com:scylladb/scylladb:
doc: add notes to feature pages which don't support tablets
cql: adjust warning about tablets
cql: forbid having counter columns in tablets tables
c6cffe36dd
