refactor(rome_js_analyze): update error messages for UseAltText diagnostics

[nissy-dev]

Summary

This PR is a follow-up for #4437
I updated error messages considering object elements.

Test Plan

I updated snapshots.

Changelog

This is internal refactoring.

• The PR requires a changelog line

Documentation

• The PR requires documentation
• I will create a new PR to update the documentation

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[ematipico]

There's a small opportunity for refactoring :) overall, it looks good!

[ematipico]

Here's a suggestion, you could DRY this code like this:

First, we apply rome_console::fmt::Display to ValidatedElement:

impl rome_console::fmt::Display for ValidatedElement {
    fn fmt(&self, fmt: &mut Formatter) -> std::io::Result<()> {
        match self {
            ValidatedElement::Object => fmt.write_markup(markup!(<Emphasis>"title"</Emphasis>)),
            _ => fmt.write_markup(markup!(<Emphasis>"alt"</Emphasis>))
        }
    }
}

And then we just need to display it here:

let message = markup!(
"Provide a text alternative through the "{{validate_element}}", "<Emphasis>"aria-label"</Emphasis>" or "<Emphasis>"aria-labelledby"</Emphasis>" attribute"
).to_owned();

[nissy-dev]

Thank you! I updated in 33e8927