This tackles an issue with us exposing unnecessary env variables in
environment which are not actually needed for tasks themselves (and may
have little utility), yet come into the way of ssh remoting.
/cc @ConradIrwin
Release Notes:
- N/A
Release Notes:
- Added Runnable for C main function
This tags can then be used in tasks, for example:
```json
[
{
"label": "Run ${ZED_STEM}",
"command": "gcc",
"args": [
"$ZED_FILE",
"-o",
"${ZED_DIRNAME}/${ZED_STEM}.out",
"&&",
"${ZED_DIRNAME}/${ZED_STEM}.out"
],
"tags": ["c-main"]
}
]
```