Fixes console_dbg! and console! expression output. Bold src info.

[Madoshakalaka]

    let a = 1;
    gloo_console::console_dbg!("123", a, a + 1);
    gloo_console::console_dbg!(String::from("123"));
    gloo_console::console!(b());

    let b: JsString = "123".into();
    gloo_console::console!(b);

    gloo_console::console!({let c: JsString = "cc".into(); c});

[Madoshakalaka]

This is no longer necessary, existed for two reasons:

1. expression called twice
2. align lifetimes of multiple expressions

1 won't happen anymore because now both macros only run the expression once and bind them to a variable.
2 is not necessary. It's only needed in cases like assert_eq.

[Madoshakalaka]

@hamza1311 had an extra comma that failed the tests. If you can approve the CI, it should pass now