feat: Support casting string float types

[coderfender]

Which issue does this PR close?

Closes #326 (part 1 - String to Float casts)

Rationale for this change

Comet currently supports some basic string -> non int casts and this PR essentially extends on that to support all possible casts from string to float/double (decimal casts are covered in a different PR)

What changes are included in this PR?

Updates to cast logic to support exhaustive casts from string to numeric float

Float inputs (which should include DoubleType)

1. Added logic to support all float types along with scientific notation handling
2. Added unit tests to support double and float casts

How are these changes tested?

Unit tests for specific edge cases like infinity, scientific notations etc (covering the edge cases mentioned in the linked issue) and fuzz tests to make sure all valid/invalid inputs are verified

cc : @andygrove , @martin-g

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.58%. Comparing base (f09f8af) to head (a03bbd1).
⚠️ Report is 799 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2835      +/-   ##
============================================
+ Coverage     56.12%   59.58%   +3.45%     
- Complexity      976     1365     +389     
============================================
  Files           119      167      +48     
  Lines         11743    15490    +3747     
  Branches       2251     2567     +316     
============================================
+ Hits           6591     9230    +2639     
- Misses         4012     4962     +950     
- Partials       1140     1298     +158     

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[coderfender]

Fixed issues with formatting

[coderfender]

Fixed failing tests and added some more . Also modularized to replicate spark's behavior

[coderfender]

Reasons for the tests to be failing :

1. Test name mismatch (Comet is checking for cast {dt} to {dt} while the actual test name has ANSI support cast StringType to FloatType .
2. Err msg Mismatches between Spark and Comet outputs

[coderfender]

The failures were largely semantic caused due to mismatch in the error message (whitespace) and test nomenclature

[coderfender]

The cast suite was specifically testing for Decimal(10,2) data type only. Changed to make make sure all casts are now supported. Barring that no semantic / incorrect results are observed

[coderfender]

The tests are all passing. PR is ready for review

[coderfender]

Splitting this into multiple PRs for better readability

[andygrove]

LGTM. Thanks @coderfender

[coderfender]

Thank you @andygrove

[andygrove]

@coderfender There is a clippy warning:

    Checking datafusion-comet-spark-expr v0.13.0 (/__w/datafusion-comet/datafusion-comet/native/spark-expr)
error: unused variable: `allow_incompat`
    --> spark-expr/src/conversion_funcs/cast.rs:1214:5
     |
1214 |     allow_incompat: bool,
     |     ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_allow_incompat`

[coderfender]

@andygrove thank you very much . Let me fix the warning and push a commit right away

[coderfender]

@andygrove pushed a commit to fix clippy errors. Please kickoff CI whenever you get a chance

[coderfender]

@andygrove the CI is passing now . Please merge it whenever you get a chance . Thank you