Cleanup memory analyzer documentation

[tautschnig]

Update example formatting in the man page to make it consistent with our other man pages, and remove now-redundant Markdown file (all its content was moved to the man page).

• Each commit message has a non-empty body, explaining why the change was made.
• n/a Methods or procedures I have added are documented, following the guidelines provided in CODING_STANDARD.md.
• n/a The feature or user visible behaviour I have added or modified has been documented in the User Guide in doc/cprover-manual/
• n/a Regression or unit tests are included, or existing tests cover the modified code (in this case I have detailed which ones those are in the commit message).
• n/a My commit message includes data points confirming performance improvements (if claimed).
• My PR is restricted to a single feature or bugfix.
• n/a White-space or formatting changes outside the feature-related changed lines are in commits of their own.

[codecov]

Codecov Report

Base: 77.82% // Head: 77.82% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (1445da9) compared to base (3108086).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #7168      +/-   ##
===========================================
- Coverage    77.82%   77.82%   -0.01%     
===========================================
  Files         1578     1578              
  Lines       182209   182242      +33     
===========================================
+ Hits        141805   141824      +19     
- Misses       40404    40418      +14     

Impacted Files	Coverage Δ
src/goto-instrument/dump_c.cpp	80.00% <0.00%> (-0.87%)	⬇️

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