Force top level status properties to be optional

[matthchr]

What this PR does / why we need it:
There are times when Status doesn't exist, such as when an object is first created. There's a bit of an unwritten rule that:

1. Status is not a pointer on the resource.
2. All top level status properties have omitempty set.

This way when there isn't a status, there's not a bunch of extra ""'s returned.

This is especially important for some multi-write cases between spec and status, as ""'s returned can overwrite in-memory data before it has a chance to be sent via a client.Status().Update() call

How does this PR make you feel:

[codecov-commenter]

Codecov Report

Merging #1694 (436ac4a) into master (462f59f) will decrease coverage by 0.10%.
The diff coverage is 39.47%.

❗ Current head 436ac4a differs from pull request most recent head a3da71a. Consider uploading reports for the commit a3da71a to get more accurate results

@@            Coverage Diff             @@
##           master    #1694      +/-   ##
==========================================
- Coverage   68.29%   68.18%   -0.11%     
==========================================
  Files         217      218       +1     
  Lines       15438    15474      +36     
==========================================
+ Hits        10543    10551       +8     
- Misses       4132     4154      +22     
- Partials      763      769       +6     

Impacted Files	Coverage Δ
hack/generator/pkg/astmodel/types.go	67.51% <33.33%> (-0.46%)	⬇️
...odegen/pipeline/make_status_properties_optional.go	38.70% <38.70%> (ø)
hack/generator/pkg/codegen/code_generator.go	89.17% <100.00%> (+0.06%)	⬆️
hack/generator/pkg/astmodel/package_reference.go	88.28% <0.00%> (-2.71%)	⬇️
...ted/pkg/reconcilers/azure_deployment_reconciler.go	68.33% <0.00%> (-0.96%)	⬇️

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