init.rc: Add nodev,noexec,nosuid to /config

This change adds some additional flags to the /config mount. This is to
reduce the number of mounts with unnecessary privileges.

Bug: 73255020
Test: aosp_sailfish still boots
Test: CtsAppSecurityHostTestCases {ExternalStorageHostTest,StorageHostTest}
Merged-In: If3409d917cdf76a67ebfb7c4035a3ae8fee6189f
Change-Id: If3409d917cdf76a67ebfb7c4035a3ae8fee6189f