Simplify bounded (w)string CDR support

[jwillemsen]

* ridlbe/c++11/templates/cli/src/string_cdr.erb:
  Deleted.

* tao/x11/bounded_string_cdr_t.h:
  Added.

* ridlbe/c++11/templates/cli/prx/string_cdr.erb:
* ridlbe/c++11/writers/stubproxyheader.rb:
* ridlbe/c++11/writers/stubproxysource.rb:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.80%. Comparing base (dbd240e) to head (a720905).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #387      +/-   ##
==========================================
- Coverage   59.80%   59.80%   -0.01%     
==========================================
  Files         596      596              
  Lines       47581    47581              
  Branches     4215     4213       -2     
==========================================
- Hits        28455    28454       -1     
  Misses      16006    16006              
- Partials     3120     3121       +1     

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[jwillemsen]

24.04 seems a runner issue, created actions/runner-images#9937