Added free space check for healthchecks and node shutdown when free s…

[damian-orzechowski]

…pace falls below a configurable threshold.

Resolves #4325

Changes:

• Added free disk space checks for drive configured as DB location. There are 2 configurable thresholds added:
  • LowStorageSpaceWarningThreshold - percentage of free disk space below which a warning is added to the console as well as to the HealthChecks. Default value is 5%.
  • LowStorageSpaceShutdownThreshold - percentage of fee disk space below which node will shutdown. Default value is 1%.

Types of changes

What types of changes does your code introduce?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Other (please describe):

Testing

Requires testing

• Yes
• No

In case you checked yes, did you write tests??

• Yes
• No

Further comments (optional)

Tested on Windows, Ubuntu (VM and WSL) and Docker
For Docker, please note that when data folder is not mapped to an external volume, drive information will reflect the size of the virtual drive, which may not correspond to physical space.

[LukaszRozmej]

I think all this messagebus and friends can be simplified with simple Environment.Exit

[LukaszRozmej]

Will 1% be enough on average disk to close the node and save all state?