feat: all vnodes have owner components

[mlrawlings]

Description

VText nodes (all all vnodes for that matter) now have an owner component or a parent with the same owner component (static subtrees only have an owner component on the root node).

This is needed for own owner tree snapshot tool that's been in progress for a while now.

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 #1517 into master will decrease coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1517      +/-   ##
==========================================
- Coverage   90.55%   90.49%   -0.07%     
==========================================
  Files         353      353              
  Lines       12718    12675      -43     
==========================================
- Hits        11517    11470      -47     
- Misses       1201     1205       +4

Impacted Files	Coverage Δ
...te/all-templates/non-standard-template-literals.js	100% <100%> (ø)	⬆️
packages/marko/src/runtime/components/index.js	95.55% <100%> (-3.68%)	⬇️
packages/marko/src/compiler/Walker.js	92.5% <0%> (-1.25%)	⬇️

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