refactor: migrate data collection and some others away from BottomError

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

Removes the BottomError::InvalidIo error type, which was mostly used for data collection and drawing, and updates the use sites.

Issue

If applicable, what issue does this address?

Closes: #

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[codecov]

Codecov Report

Attention: Patch coverage is 8.75000% with 73 lines in your changes missing coverage. Please review.

Project coverage is 40.66%. Comparing base (c56e283) to head (25fede0).

Files	Patch %	Lines
src/data_collection/processes/linux.rs	0.00%	59 Missing ⚠️
src/data_collection/error.rs	0.00%	6 Missing ⚠️
src/data_collection/processes/unix/user_table.rs	0.00%	3 Missing ⚠️
src/data_collection/processes.rs	0.00%	1 Missing ⚠️
src/data_collection/processes/unix.rs	0.00%	1 Missing ⚠️
src/data_collection/processes/unix/process_ext.rs	0.00%	1 Missing ⚠️
src/data_collection/processes/windows.rs	0.00%	1 Missing ⚠️
src/main.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1497       +/-   ##
===========================================
- Coverage   53.51%   40.66%   -12.86%     
===========================================
  Files         103      104        +1     
  Lines       17546    17547        +1     
===========================================
- Hits         9390     7135     -2255     
- Misses       8156    10412     +2256     

Flag	Coverage Δ
macos-12	36.00% <0.00%> (-0.01%)	⬇️
ubuntu-latest	42.61% <9.09%> (-13.52%)	⬇️
windows-2019	36.13% <0.00%> (-0.01%)	⬇️

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