fix(console): prevent duplicate error printing when the cause is assi…

[MujahedSafaa]

This commit fixes the error format when the cause is assigned separately, ensuring that the cause is only printed once instead of twice.

The fix addresses issue #21651.

Use Case
When an error instance has a cause assigned separately, it produces the same output as when the cause is passed directly to the Error constructor.
constructed-with-cause.js

const x = new SyntaxError("improper syntax")
    const y = new TypeError("type incorrect", { cause: x })
    console.log(y)

assigned-cause.js

const x = new SyntaxError("improper syntax")
    const y = new TypeError("type incorrect")
    y.cause = x

When running the command deno run constructed-with-cause.js, the cause is printed twice. This occurs because the inspectError function checks for a cause property in the error and appends it to the final message, leading to the first print. The second print happens due to the direct assignment of the cause, which makes it an enumerable property. When the getKeys function retrieves the enumerable keys from the error, it includes cause, resulting in it being appended again to the final message after calling formatProperty, which invokes inspectError once more. as shown in this code:

Code changes

A) Skip adding the cause as a key since it is already handeled in the inspectError method

[MujahedSafaa]

Hi @dsherret @crowlKats
Could you please review this PR? I'm also unsure how to run the test that's failing in the job locally. Do you have any tips on how I can reproduce the failure on my machine?

[MujahedSafaa]

Could you please review this PR @crowlKats, and merge it if it's ready?

[crowlKats]

LGTM