kv: expose isolation level through kv.Txn API #100130
Description
With the (re-)introduction of weak isolation levels, KV will want to expose isolation levels through kv.Txn API.
Jira issue: CRDB-26572
Epic CRDB-26539
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With the (re-)introduction of weak isolation levels, KV will want to expose isolation levels through kv.Txn API.
Jira issue: CRDB-26572
Epic CRDB-26539