Since creating the vector index does not lead to creation of a view table [#24438] (whose version info had been logged in `system_schema.scylla_tables`) we lacked the information about the version of the index.
The solution we arrived at is to add the version as a field in options column of `system_schema.indexes`.
It requires few changes and seems unintruitive for existing infrastructure.
This patch implements the solution described above.
Refs: VECTOR-142
Closesscylladb/scylladb#25614
* github.com:scylladb/scylladb:
cqlpy/test_vector_index: add vector index version test
vector_index, index_prop_defs: add version to index options
create_index_statement: rename `validator` to `custom_index_factory`
custom index: rename `custom_index_option_name`
vector_index: rename `supported_options` to `vector_index_options`
5307d1b9a8