Fix mocking the xen-bugtool script in with Python 3.12

[bernhardkaindl]

Fix for importing and mocking the xen-bugtool script as a module in Python 3.12:

Python3.12's mocker.patch() stopped supporting modules with a "-" in them.

Use "bugtool" as the module name instead of "xen-bugtool" to avoid this problem with the mocker.patch() function in Python 3.12.

The other commit in this PR for the dictionary file is needed to fix the spellcheck in CI.

[codecov]

Codecov Report

Merging #90 (7193884) into master (d0e569d) will increase coverage by 9%.
Report is 10 commits behind head on master.
The diff coverage is 100%.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #90     +/-   ##
======================================
+ Coverage      88%   98%     +9%     
======================================
  Files          18    18             
  Lines        2196   626   -1570     
======================================
- Hits         1939   615   -1324     
+ Misses        257    11    -246     

Files	Coverage Δ
tests/unit/conftest.py	100% <100%> (ø)
tests/unit/test_dump_xapi_rrds.py	100% <100%> (ø)
tests/unit/test_output.py	100% <100%> (ø)

... and 1 file with indirect coverage changes

Flag	Coverage Δ
python2.7	95% <100%> (+8%)	⬆️
python3.10.13	100% <100%> (+12%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

[coveralls]

Pull Request Test Coverage Report for Build 8373887749

Details

• 5 of 5 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.2%) to 94.697%

---

Totals
Change from base Build 8373764528:	2.2%
Covered Lines:	625
Relevant Lines:	660

---

💛 - Coveralls