Misc perf improvements

[DylanPiercey]

Description

Many of these performance improvements are targeted toward legacy components, however some also improve modern components.

Legacy widget improvements include:

• Serializing legacy body content & widgetConfig now use less bytes.
• Legacy components no longer necessarily serialize an empty object for component props (this is now skipped for legacy components)
• Legacy components no longer serialize null for input, instead use 0.

Modern component improvements include:

• Places where a nonce is added to scripts now uses the optimized double quote escape instead of JSON.stringify.
• Simplified key sequence code and use null prototype objects where possible.
• Server component simplified to use noops for missing lifecycle methods.
• Dynamic tag can now better tell apart user keys from auto keys which reduces the number of data-marko-key attributes output for split components.
• Dynamic tag runtime optimized into a few more specialized functions and other micro optimizations.
• HTML attribute helper now optimized for the common case of dealing with strings.
• HTML attribute helper will now assume strings that start with { are JSON, and use single quotes.
• Double & Single quote escape helpers now use a different implementation than the escape body content and no longer escape &.
• Attribute name validity cache on the server side now uses a Set.

Checklist:

• I have read the CONTRIBUTING document and have signed (or will sign) the CLA.
• I have updated/added documentation affected by my changes.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Merging #1535 into master will increase coverage by 0.00%.
The diff coverage is 96.45%.

@@           Coverage Diff           @@
##           master    #1535   +/-   ##
=======================================
  Coverage   90.51%   90.52%           
=======================================
  Files         352      353    +1     
  Lines       12645    12657   +12     
=======================================
+ Hits        11446    11458   +12     
  Misses       1199     1199           

Impacted Files	Coverage Δ
packages/marko/src/runtime/components/Component.js	95.86% <ø> (-0.02%)	⬇️
.../src/runtime/components/GlobalComponentsContext.js	100.00% <ø> (ø)
...o/src/runtime/components/legacy/renderer-legacy.js	97.00% <ø> (ø)
packages/marko/src/runtime/helpers/_weak-map.js	42.85% <42.85%> (ø)
packages/marko/src/runtime/html/helpers/attr.js	96.00% <95.00%> (-4.00%)	⬇️
...rc/compiler/ast/HtmlAttribute/html/generateCode.js	91.30% <100.00%> (ø)
...kages/marko/src/runtime/components/ComponentDef.js	98.61% <100.00%> (+0.03%)	⬆️
...ckages/marko/src/runtime/components/KeySequence.js	100.00% <100.00%> (ø)
...es/marko/src/runtime/components/ServerComponent.js	63.33% <100.00%> (-7.72%)	⬇️
packages/marko/src/runtime/components/dom-data.js	100.00% <100.00%> (+50.00%)	⬆️
... and 10 more

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