Add a convention for CSS class names generated within js files

[mshustov]

In #74091 I had to mute @typescript-eslint/naming-convention rule manually for CSS classes created in react components because they don't abide by the regular JS naming convention. Examples:

• componentName__element--modifier
• componentName__element__element

kibana/src/plugins/advanced_settings/public/management_app/components/form/form.tsx

Lines 339 to 340 in 903f0e6

	// eslint-disable-next-line @typescript-eslint/naming-convention
	'mgtAdvancedSettingsForm__bottomBar--pushForNav':

We need to find a solution to exclude such variables from the linting on the project level. For example, we could use a special prefix or a suffix to filter them out.