Simplify SsrNode and HydrateNode codegen in view! macro

[lukechu10]

Fixes exponential code generation when using SSR and hydration with the view! macro.
Also fixes hydration errors related to the fact that code in client side is not executed in the same order as on the server side.

[codecov]

Codecov Report

Merging #392 (b744aa7) into master (48bdd72) will decrease coverage by 0.05%.
The diff coverage is 79.31%.

@@            Coverage Diff             @@
##           master     #392      +/-   ##
==========================================
- Coverage   63.18%   63.12%   -0.06%     
==========================================
  Files          47       48       +1     
  Lines        7735     7750      +15     
==========================================
+ Hits         4887     4892       +5     
- Misses       2848     2858      +10     

Impacted Files	Coverage Δ
packages/sycamore/src/utils/mod.rs	33.33% <33.33%> (ø)
packages/sycamore-macro/src/view/codegen.rs	96.25% <100.00%> (+0.26%)	⬆️
website/src/main.rs	0.58% <0.00%> (-0.02%)	⬇️

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