Add Channel Access Report functions

[AlexanderWells-diamond]

Includes casr, dbel, and dbcar. Does not include ascar as we don't have Access Security rules in PythonSoftIOC.

See documentation in the Developer Guide section 9.10 Channel Access Reports

[codecov[bot]]

Codecov Report

Merging #115 (ae754b2) into master (f1f3623) will increase coverage by 0.03%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #115      +/-   ##
==========================================
+ Coverage   87.11%   87.15%   +0.03%     
==========================================
  Files          14       14              
  Lines         978      981       +3     
==========================================
+ Hits          852      855       +3     
  Misses        126      126              

Impacted Files	Coverage Δ
softioc/softioc.py	77.98% <100.00%> (+0.62%)	:arrow_up:

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Unit Test Results

     15 files  ±0       15 suites  ±0   33m 15s :stopwatch: +48s    249 tests ±0     243 :heavy_check_mark: ±0      6 :zzz: ±0  0 :x: ±0  3 735 runs  ±0  3 295 :heavy_check_mark: ±0  440 :zzz: ±0  0 :x: ±0 

Results for commit ae754b2e. ± Comparison against base commit f1f36234.