Add KNOWNBUG to float-trace as a temporary fix

[TGWDB]

This is broken in some CI due to a Windows upgrade. This is a quick
and temporary fix so that other things can progress until CI is
properly resolved.

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

[NlightNFotis]

Approved as temporary fix, but we need to get a ticket to revisit later and root cause.

[codecov]

Codecov Report

Merging #6336 (aeba3f0) into develop (d0e76ee) will decrease coverage by 0.01%.
The diff coverage is 63.63%.

@@             Coverage Diff             @@
##           develop    #6336      +/-   ##
===========================================
- Coverage    75.91%   75.89%   -0.02%     
===========================================
  Files         1515     1515              
  Lines       163972   163972              
===========================================
- Hits        124472   124444      -28     
- Misses       39500    39528      +28     

Impacted Files	Coverage Δ
...mc/src/java_bytecode/java_local_variable_table.cpp	95.22% <ø> (ø)
...nit/java-testing-utils/require_goto_statements.cpp	82.82% <ø> (ø)
...va_bytecode/java_replace_nondet/replace_nondet.cpp	85.26% <0.00%> (ø)
...de/java_trace_validation/java_trace_validation.cpp	100.00% <ø> (ø)
src/analyses/local_cfg.h	75.00% <ø> (ø)
src/analyses/local_safe_pointers.cpp	81.55% <ø> (ø)
src/analyses/local_safe_pointers.h	100.00% <ø> (ø)
...yses/variable-sensitivity/abstract_environment.cpp	95.02% <ø> (ø)
src/ansi-c/c_typecheck_base.h	100.00% <ø> (ø)
src/cbmc/c_test_input_generator.cpp	60.00% <ø> (ø)
... and 266 more

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