Make expose_php configurable

[DracoBlue]

@DerSimeon prepared some PRs to make it configurable:

• Added 'expose_php' to the env vars [8.1] #50
• Added 'expose_php' to the env vars [8.0] #49
• Added 'expose_php' to the env vars [8.2-zts] #48
• Added 'expose_php' to the env vars [8.2] #47

default is 1

https://www.php.net/manual/en/ini.core.php#ini.expose-php