buttonClasses.ts is missing options for success, error, warning, and info

It appears that several button variants are missing from buttonClasses.ts

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

I am trying to change the hover color for a number of button variants using a custom theme. I'd like to set the option in the theme like this:

export const themeOptions: ThemeOptions = {
    palette: { ... }
    components: {
        MuiButton: {
            styleOverrides: {
                containedPrimary: {  // OK
                    '&:hover': {
                        background: '#F00'
                    },
                },
                containedError: {  // NOT OK
                    '&:hover': {
                        background: '#0F0'
                    },
                },
                ...
            }
        }
    }
};

This results in TypeScript complaining as follows:
Object literal may only specify known properties, and 'containedError' does not exist in type 'Partial<OverridesStyleRules<keyof ButtonClasses>>'.ts(2322)

Expected Behavior 🤔

I'd expect that these button variants exist as supported types by buttonClasses.

Steps to Reproduce 🕹

Steps:

1. Create a custom theme using TypeScript
2. Add a MuiButton styleOverride for a variant like containedError.
3. Observe the TypeScript error

Context 🔦

I'm trying to change the styling of button variants.

Your Environment 🌎

`npx @mui/envinfo`

Using Chrome

System:
OS: macOS 11.6
Binaries:
Node: 16.1.0 - ~/.nvm/versions/node/v16.1.0/bin/node
Yarn: Not Found
npm: 7.13.0 - ~/.nvm/versions/node/v16.1.0/bin/npm
Browsers:
Chrome: 95.0.4638.69
Edge: Not Found
Firefox: Not Found
Safari: 14.1.2
npmPackages:
@emotion/react: ^11.5.0 => 11.5.0
@emotion/styled: 10.0.27
@mui/core: ^5.0.0-alpha.51 => 5.0.0-alpha.54
@mui/material: ^5.0.3 => 5.1.0
@mui/private-theming: 5.1.0
@mui/styled-engine: 5.1.0
@mui/system: ^5.0.4 => 5.1.0
@mui/types: 7.1.0
@mui/utils: 5.1.0
@types/react: ^17.0.14 => 17.0.33
react: 17.0.2 => 17.0.2
react-dom: 17.0.2 => 17.0.2
typescript: ^4.3.5 => 4.4.4

tsconfig

{ "compilerOptions": { "target": "es5", "lib": [ "dom", "dom.iterable", "esnext" ], "allowJs": true, "skipLibCheck": true, "strict": false, "forceConsistentCasingInFileNames": true, "noEmit": true, "esModuleInterop": true, "module": "esnext", "moduleResolution": "node", "resolveJsonModule": true, "isolatedModules": true, "jsx": "preserve" }, "include": [ "next-env.d.ts", "**/*.ts", "**/*.tsx" ], "exclude": [ "node_modules" ] }

Start in buttonClasses.ts and inspect how MuiButton styleOverrides keys are typed, especially the containedError, containedSuccess, containedWarning, and containedInfo variants. Reproduce the TypeScript error with a custom theme and verify that these variant overrides are accepted without errors.