SYN-5736: storm support for octal constants

[ghost]

• Add octal regex and plumb to appropriate locations
• Update NUMBER, HEXNUMBER and OCTNUMBER regexes with multi-line and comments for easier reading

Resolves SYN-5736

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.11 ⚠️

Comparison is base (e11a461) 97.29% compared to head (4f59e12) 97.19%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3231      +/-   ##
==========================================
- Coverage   97.29%   97.19%   -0.11%     
==========================================
  Files         225      225              
  Lines       45054    45054              
==========================================
- Hits        43837    43791      -46     
- Misses       1217     1263      +46     

Flag	Coverage Δ
linux	97.19% <ø> (ø)
linux_replay	?

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Impacted Files	Coverage Δ
synapse/lib/parser.py	98.51% <ø> (ø)
synapse/lib/storm_format.py	100.00% <ø> (ø)
synapse/utils/stormcov/plugin.py	98.71% <ø> (ø)

... and 9 files with indirect coverage changes

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