inline $$invalidate calls

[Rich-Harris]

fixes #3512. This is an alternative to #3532 — it's definitely not as elegant, as PRs go, but it means we can eliminate a decent chunk of code, and should handle some funky edge cases around destructuring assignments.

Still a bit of tidying up to do — it should be possible to remove some more lines of code, as there's currently some duplication between Expression.ts and render_dom/index.ts.

[codecov-io]

Codecov Report

Merging #3533 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3533   +/-   ##
=======================================
  Coverage   50.25%   50.25%           
=======================================
  Files           1        1           
  Lines         197      197           
=======================================
  Hits           99       99           
  Misses         98       98

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