* [vcpkg] Add disk space report to PR/CI
Example output:
```
Disk Label Size Free Space
---- ----- ---- ----------
C: Sabrent 1907 GiB 1239 GiB
D: Dev 447 GiB 383 GiB
E: Samsung 960 Pro 1908 GiB 1084 GiB
H: Rocket 3815 GiB 863 GiB
R: 0 B 0 B
S: 0 B 0 B
```