Release notes for 1.7.0 preview

[michaelgsharp]

These are the release notes for the 1.7.0 preview. If/when more bugs are fixed I will add them to these release notes after.

[codecov]

Codecov Report

Merging #5982 (afd88ef) into main (9b28b24) will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5982      +/-   ##
==========================================
+ Coverage   68.24%   68.29%   +0.05%     
==========================================
  Files        1143     1143              
  Lines      242869   242869              
  Branches    25388    25388              
==========================================
+ Hits       165734   165856     +122     
+ Misses      70441    70328     -113     
+ Partials     6694     6685       -9     

Flag	Coverage Δ
Debug	68.29% <ø> (+0.05%)	⬆️
production	62.96% <ø> (+0.06%)	⬆️
test	88.62% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...rosoft.ML.AutoML/ColumnInference/TextFileSample.cs	59.60% <0.00%> (-5.97%)	⬇️
....ML.AutoML/PipelineSuggesters/PipelineSuggester.cs	81.88% <0.00%> (-3.15%)	⬇️
src/Microsoft.ML.Maml/MAML.cs	24.36% <0.00%> (-1.02%)	⬇️
src/Microsoft.ML.AutoML/Sweepers/Parameters.cs	84.74% <0.00%> (-0.85%)	⬇️
src/Microsoft.ML.Data/Utils/LossFunctions.cs	67.35% <0.00%> (+0.51%)	⬆️
...oft.ML.StandardTrainers/Standard/SdcaMulticlass.cs	92.15% <0.00%> (+1.02%)	⬆️
...crosoft.ML.StandardTrainers/Optimizer/Optimizer.cs	73.12% <0.00%> (+1.15%)	⬆️
src/Microsoft.ML.Sweeper/AsyncSweeper.cs	72.78% <0.00%> (+1.36%)	⬆️
...crosoft.ML.StandardTrainers/Standard/SdcaBinary.cs	88.13% <0.00%> (+3.07%)	⬆️
src/Microsoft.ML.Data/Training/TrainerUtils.cs	69.67% <0.00%> (+3.81%)	⬆️
... and 2 more