SYN-6144: stormtypes stor functions are not checked for readonly status

[MichaelSquires]

feat: Check storm runtime for readonly status when setting properties on storm types.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.11% ⚠️

Comparison is base (7142d2e) 97.27% compared to head (621a428) 97.16%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3349      +/-   ##
==========================================
- Coverage   97.27%   97.16%   -0.11%     
==========================================
  Files         228      228              
  Lines       46490    46503      +13     
==========================================
- Hits        45221    45186      -35     
- Misses       1269     1317      +48     

Flag	Coverage Δ
linux	97.16% <100.00%> (-0.01%)	⬇️
linux_replay	?

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Files Changed	Coverage Δ
synapse/lib/stormlib/smtp.py	100.00% <100.00%> (ø)
synapse/lib/stormtypes.py	98.76% <100.00%> (+<0.01%)	⬆️

... and 10 files with indirect coverage changes

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