🛠️ [TASK] : Add support for running in privileged mode

[jmgilman]

In some cases, especially when using earthly:dind images, a target must be executed with the -P flag to escalate privileges. The current design of the CI system is restricted to treating all targets the same, meaning it's not currently possible to arbitrarily pass additional flags to a specific target. This issue proposes two potential solutions:

1. Implement a new subcommand in the CLI that determines if a specific target is using the earthly:dind image. This will be run before executing the target and used to conditionally pass the -P flag.
2. Implement support for a "special comment" within a target that the CI scans for and parses. This comment can have multiple key=value pairs which can configure the way the target is executed.
   1. For example: # ci: privileged=true
3. Add a special _priv suffix to targets (i.e., check_priv) which executes the target in privileged mode.

The second option is preferred for flexibility but requires a lot more work to implement.