Don't include the default version as an explicit version in v3

[danielrbradley]

Due to low confidence on the migration path in v2, we added all resource being used in the default version as explicit versions too.

With the improved aliasing approach from #3872, this is not required any more.

See the preview generation against the v3 branch: v3...dont-duplicate-default-as-explicit-v3-preview

This has a net reduction of 1,118,866 lines of SDK code and an uncompressed size reduction of just under 7% to deliver a 48% overall reduction for v3.

SDK	v2 size	v3 size	new v3 size
dotnet	653M	363M	340M
nodejs	300M	166M	156M
python	717M	401M	376M

[github-actions]

Does the PR have any schema changes?

Looking good! No breaking changes found.
No new resources/functions.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 57.03%. Comparing base (1a58192) to head (7b05641).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
provider/pkg/versioning/gen.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3924   +/-   ##
=======================================
  Coverage   57.02%   57.03%           
=======================================
  Files          79       79           
  Lines       12548    12548           
=======================================
+ Hits         7156     7157    +1     
+ Misses       4841     4840    -1     
  Partials      551      551           

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[thomas11]

nice find!!