Copy both ObjectMeta and TypeMeta when doing version conversion

[theunrepentantgeek]

What this PR does / why we need it:

Includes embedded properties when doing intra-version conversion of resources; copying of ObjectMeta is required to maintain the name of the resource.

Also simplifies ResourceType by removing support for arbitrary properties - we've found that we don't need it.

Resolves #1565

How does this PR make you feel:

[codecov-commenter]

Codecov Report

Merging #1985 (8d402b4) into main (0bb670f) will increase coverage by 0.03%.
The diff coverage is 95.23%.

@@            Coverage Diff             @@
##             main    #1985      +/-   ##
==========================================
+ Coverage   57.19%   57.23%   +0.03%     
==========================================
  Files         422      422              
  Lines       85526    85624      +98     
==========================================
+ Hits        48917    49007      +90     
+ Misses      30371    30353      -18     
- Partials     6238     6264      +26     

Impacted Files	Coverage Δ
...tch/v1alpha1api20210101/batch_account_types_gen.go	44.52% <ø> (+0.90%)	⬆️
...2/tools/generator/internal/astmodel/object_type.go	79.69% <ø> (ø)
...s/generator/internal/astmodel/package_reference.go	91.81% <ø> (ø)
.../generator/internal/astmodel/property_container.go	100.00% <ø> (ø)
...rator/internal/conversions/property_conversions.go	75.25% <50.00%> (+0.04%)	⬆️
...al/conversions/readable_conversion_endpoint_set.go	92.00% <80.00%> (-3.13%)	⬇️
...al/conversions/writable_conversion_endpoint_set.go	93.93% <80.00%> (-6.07%)	⬇️
...tools/generator/internal/astmodel/resource_type.go	80.56% <83.33%> (-1.65%)	⬇️
...ha1api20200801preview/role_assignment_types_gen.go	63.07% <100.00%> (+0.19%)	⬆️
...soft.compute/v1alpha1api20200930/disk_types_gen.go	49.91% <100.00%> (+0.34%)	⬆️
... and 60 more

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