fix: OutputFolder path issue when both output and dest properties are specified

[filzrev]

This PR intended to fix issue #8967

Currently when both output and dest properties are specified.
It's resolved to {baseDir}/{output}/{dest} path.

It cause problems when specifying dest on config and using --output parameter.

This PR changes this behavior to use output if it's specified by config/parameter.
And only use the dest property if the `output' parameter is not specified.

Additionally following changes are included in this PR.

• Add [Obsolete] attribute to dest property.
  • It seems a lot of user using dest property. So it shouldn be removed after Json schema validation logics are integrated.
• Modify existing tests that use dest property. And add warning suppressions that use dest property.
• Change new TemplateManager's constructor parameter to use baseDirectory (No behavior changes)
• Remove unused optionsBaseDirectory variable and comments.

[codecov]

Codecov Report

Attention: Patch coverage is 53.84615% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 78.91%. Comparing base (fe673ec) to head (0051a98).
Report is 183 commits behind head on main.

Files	Patch %	Lines
src/Docfx.App/PdfBuilder.cs	0.00%	4 Missing ⚠️
src/Docfx.App/RunBuild.cs	80.00%	0 Missing and 1 partial ⚠️
src/Docfx.Dotnet/DotnetApiCatalog.cs	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9975      +/-   ##
==========================================
+ Coverage   74.31%   78.91%   +4.59%     
==========================================
  Files         536      540       +4     
  Lines       23189    23434     +245     
  Branches     4056     4059       +3     
==========================================
+ Hits        17234    18494    +1260     
+ Misses       4853     3802    -1051     
- Partials     1102     1138      +36     

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