CA1416 Do not warn for OS dependent messages for creating NotSupportedExceptions

[buyaa-n]

Fixes #4545. Related to #4576 raising PR for 5.0.2

@jmarolf this PR is not introducing any new warning, instead reduces false positives, so we decided to merge it to 5.0.2
CC @jeffhandley @mavasani

We should ignore diagnostics in throw statements as they are not platform specific operation and causing false positives, i made sure it ignores exception messages for a block not only just throwing, but having some other statements too, i think this will be more useful for conditional throwing like:

[SupportedOSPlatform("browser")]
public static class SR
{
    public static string Message {get; set;}
    public static void M1() { }
}

public class Test
{
    void ConditionallyThrowWithStringConstructor()
    {
        SR.M1(); // warns 
        if (!OperatingSystem.IsBrowser())
        {
            throw new PlatformNotSupportedException(SR.Message); // not warns
        }
        SR.M1() // not warns
    }
}

[codecov]

Codecov Report

Merging #4577 (fa9d8a1) into release/5.0.2xx (e1f2147) will increase coverage by 0.01%.
The diff coverage is 99.53%.

@@                 Coverage Diff                 @@
##           release/5.0.2xx    #4577      +/-   ##
===================================================
+ Coverage            95.81%   95.82%   +0.01%     
===================================================
  Files                 1187     1164      -23     
  Lines               279520   264656   -14864     
  Branches             20221    15987    -4234     
===================================================
- Hits                267815   253601   -14214     
+ Misses                9593     9024     -569     
+ Partials              2112     2031      -81     

[buyaa-n]

Seems @jmarolf is out, i am gonna merge it as it is need for fixing some of runtime warnings