Fix flat config for gts/gjs and `noop` parser name

[bmish]

Fixes #2061.

Fixes two issues:

• parser needs to be inside languagesOptions in flat config: A config object is using the "parser" key, which is not supported in flat config system. Flat config uses "languageOptions.parser" to override the default parser. https://eslint.org/docs/latest/use/configure/configuration-files-new#configuring-a-custom-parser-and-its-options
• Processor name cannot have angle brackets: TypeError: Expected string in the form "pluginName/objectName" but found "ember/<noop>".

@Techn1x @patricklx @NullVoxPopuli