Deoptimize awaited expressions

[lukastaegert]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:
Resolves #4161

Description

Currently, we are not tracking object deoptimizations through await expressions. This PR simplifies the logic here by always deoptimizing await expressions to avoid the complicated promise logic

[github-actions]

Thank you for your contribution! ❤️

You can try out this pull request locally by installing Rollup via

npm install rollup/rollup#gh-4161-await-dropping-code

or load it into the REPL:
https://rollupjs.org/repl/?pr=4162

[codecov]

Codecov Report

Merging #4162 (c9f63de) into master (5b55f99) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4162   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files         201      201           
  Lines        7127     7130    +3     
  Branches     2088     2089    +1     
=======================================
+ Hits         7005     7008    +3     
  Misses         58       58           
  Partials       64       64           

Impacted Files	Coverage Δ
src/ast/ExecutionContext.ts	100.00% <ø> (ø)
src/ast/nodes/ArrowFunctionExpression.ts	100.00% <ø> (ø)
src/ast/nodes/shared/FunctionNode.ts	100.00% <ø> (ø)
src/ast/nodes/AwaitExpression.ts	100.00% <100.00%> (ø)
src/ast/nodes/ReturnStatement.ts	100.00% <100.00%> (ø)
src/ast/nodes/YieldExpression.ts	100.00% <100.00%> (ø)

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