[release/6.0-rc2] Generic Math Preview - Use correct NumberStyle when parsing double...

[release/6.0-rc2] Generic Math Preview - Use correct NumberStyle when parsing double and float (#59366)

* User correct NumberStyle when parsing double and float

IParseable<float> and IParseable<double> would fail when parsing
a decimal point number due to incorrect NumberStyles parameter.

E.g. IParseable<double>.TryParse would fail as opposed to
IParseable<double>.Parse because the former explicitly states to use
NumberStyles.Integer

* Adding tests covering parse for float/double/half

* Delete MSBuild_pid-37116_6904092b1c9a481da960c9e28eba2a27.failure.txt

Co-authored-by: Richard Sefr <richard.sefr@solarwinds.com>
Co-authored-by: Tanner Gooding <tagoo@outlook.com>