Add a failing test for updating a table with a headerless CSV.

[sinistersnare]

This PR adds a test that crashes the test suite. It does not provide a fix, so the PR is marked as a draft for now.

Currently Perspective aborts in the C++ by updating a table with a CSV that has no header.

tbl = Table({ "stringcol": "string" })
tbl.update("rowval  \n another row val")

Results in Fatal Python error: Aborted

This bug also occurs in Rust, see the example in the below comment

[sinistersnare]

Here is the Rust example:

use std::error::Error;

use perspective::client::{ColumnType, TableData, UpdateData};
use perspective::server::Server;

#[tokio::main(flavor = "multi_thread")]
async fn main() -> Result<(), Box<dyn Error>> {
    let server = Server::default();
    let client = server.new_local_client();
    let schema = TableData::Schema(vec![("stringcol".into(), ColumnType::String)]);
    let table = client.table(schema, Default::default()).await?;
    // Note: No header row!
    let update = UpdateData::Csv("A\nB\n".to_string());
    table.update(update, Default::default()).await?;
    let csv = table.view(None).await?.to_csv(Default::default()).await?;
    println!("CSV:: {csv:?}");
    client.close().await;
    Ok(())
}

$ cargo run
   Compiling example_repo v1.0.0 (/Path/To/Example)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.53s
     Running `target/debug/example_repo`
libc++abi: terminating due to uncaught exception of type std::invalid_argument: stoll: no conversion
[1]    19940 abort      cargo run