Revert "Combine ALTER TABLE into one (#1463)"

[nablaone]

This reverts commit 2506adb.

Combined alter table statements may not always work.

Error executing ingest statement: code: 48, message: For Replicated databases it's not allowed to execute ALTERs of different types (replicated and non replicated) in single query, query: ALTER TABLE "phone_home_logs" ADD COLUMN IF NOT EXISTS "request_id" Nullable(String), COMMENT COLUMN...