[Fonts API] Remove local() from @font-face styles.

[hellofromtonya]

Fixes #42190

Core Trac https://core.trac.wordpress.org/ticket/57430

What?

Removes adding local() as a @font-face src.

Why?

From the issue:

The problem is that by taking the $font_familiy name here, we don't consider that the user may have installed the font from separate files to bold, medium, light, etc. And those files should be listed as different local files.

From the Trac ticket:

loading the local font file can lean to unexpected compatibility issues due to version or locale mismatches of the font.

Testing Instructions

Testing instructions are in the issue's description. The expected results:

Before the PR:

@font-face {
  font-family: "El Messiri";
  font-style: normal;
  font-weight: 400;
  font-display: fallback;
  src: local("El Messiri"),
    url("https://your-host.com/wp-content/themes/your-theme/assets/fonts/static/ElMessiri-Regular.ttf")
      format("truetype");
}
@font-face {
  font-family: "El Messiri";
  font-style: normal;
  font-weight: 700;
  font-display: fallback;
  src: local("El Messiri"),
    url("https://your-host.com/wp-content/themes/your-theme/assets/fonts/static/ElMessiri-Bold.ttf")
      format("truetype");
}

after the PR:

@font-face {
  font-family: "El Messiri";
  font-style: normal;
  font-weight: 400;
  font-display: fallback;
  src: url("https://your-host.com/wp-content/themes/your-theme/assets/fonts/static/ElMessiri-Regular.ttf")
      format("truetype");
}
@font-face {
  font-family: "El Messiri";
  font-style: normal;
  font-weight: 700;
  font-display: fallback;
  src: url("https://your-host.com/wp-content/themes/your-theme/assets/fonts/static/ElMessiri-Bold.ttf")
      format("truetype");
}

[hellofromtonya]

@Luehrsen Are you available to test this?