Suppress roslyn errors and warnings

[cheenamalhotra]

Suppresses roslyn errors/warnings captured in CI:

##[warning]3. RoslynAnalyzers Warning CA5398 - File: file:///C:/__w/1/s/src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/TdsParserHelperClasses.cs. Line: 770. Column 52. 
Tool: RoslynAnalyzers: Rule: CA5398 (Avoid hardcoded SslProtocols values). https://docs.microsoft.com/visualstudio/code-quality/ca5398
Avoid hardcoding SslProtocols 'Tls12' to ensure your application remains secure in the future. Use 'None' to let the Operating System choose a version.

##[error]4. RoslynAnalyzers Error CA5397 - File: file:///C:/__w/1/s/src/Microsoft.Data.SqlClient/src/Microsoft/Data/SqlClient/TdsParserHelperClasses.cs. Line: 822. Column 89. 
Tool: RoslynAnalyzers: Rule: CA5397 (Do not use deprecated SslProtocols values). https://docs.microsoft.com/visualstudio/code-quality/ca5397
Transport Layer Security protocol version 'Tls11' is deprecated.  Use 'None' to let the Operating System choose a version.

##[warning]5. RoslynAnalyzers Warning CA5398 - File: file:///C:/__w/1/s/src/Microsoft.Data.SqlClient/netcore/src/Microsoft/Data/SqlClient/TdsParserStateObjectNative.cs. Line: 416. Column 40. 
Tool: RoslynAnalyzers: Rule: CA5398 (Avoid hardcoded SslProtocols values). https://docs.microsoft.com/visualstudio/code-quality/ca5398
Avoid hardcoding SslProtocols 'Tls13' to ensure your application remains secure in the future. Use 'None' to let the Operating System choose a version.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.25%. Comparing base (39c4604) to head (ece8cb8).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2936      +/-   ##
==========================================
+ Coverage   71.92%   72.25%   +0.33%     
==========================================
  Files         294      291       -3     
  Lines       60342    59769     -573     
==========================================
- Hits        43398    43185     -213     
+ Misses      16944    16584     -360     

Flag	Coverage Δ
addons	92.90% <ø> (ø)
netcore	75.83% <ø> (+<0.01%)	⬆️
netfx	70.59% <ø> (+0.13%)	⬆️

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