Add error handling in Scheme Shard build index

[kunga]

Instead of current bunch of verifies and Scheme Shard crash loop in a case of some issues we should gracefully cancel index build

To do so, instead of Y_ABORT, use Y_ENSURE and add try-catch blocks

• Replace aborts with exceptions Switch SchemeShard from Y_ABORT to Y_ENSURE in vector index related files #19026
• TSchemeShard::TTxInit
• TSchemeShard::TIndexBuilder
  • FillVectorIndex