Plumb debug symbols when using lexical scope

[wycats]

This change introduces a new emit.debugSymbols option that can be used to enable debug symbols when using lexical scope.

[github-actions]

duration phase no difference [-308ms to 72ms]
renderEnd phase no difference [-2ms to 2ms]
render1000Items1End phase no difference [-26ms to 3ms]
clearItems1End phase no difference [-3ms to 2ms]
render1000Items2End phase no difference [-32ms to 0ms]
clearItems2End phase no difference [-1ms to 1ms]
render5000Items1End phase no difference [-97ms to 4ms]
clearManyItems1End phase no difference [-6ms to 6ms]
render5000Items2End phase no difference [-80ms to 31ms]
clearManyItems2End phase no difference [-3ms to 3ms]
render1000Items3End phase no difference [-33ms to 17ms]
append1000Items1End phase no difference [-19ms to 15ms]
append1000Items2End phase no difference [-30ms to 13ms]
updateEvery10thItem1End phase no difference [-2ms to 16ms]
updateEvery10thItem2End phase no difference [-5ms to 1ms]
selectFirstRow1End phase no difference [0ms to 0ms]
selectSecondRow1End phase no difference [-1ms to 0ms]
removeFirstRow1End phase no difference [-6ms to 3ms]
removeSecondRow1End phase no difference [-16ms to 1ms]
swapRows1End phase no difference [-15ms to 0ms]
swapRows2End phase no difference [-2ms to 0ms]
clearItems4End phase estimated regression +4ms [1ms to 8ms] OR +2.85% [0.66% to 5.09%]
paint phase no difference [0ms to 0ms]

[16:50:23] Generating Benchmark Reports [started]
[16:50:32] Generating Benchmark Reports [completed]

Benchmark Reports    

JSON: /home/runner/work/glimmer-vm/glimmer-vm/tracerbench-results/compare.json

PDF: /home/runner/work/glimmer-vm/glimmer-vm/tracerbench-results/artifact-1.pdf

HTML: /home/runner/work/glimmer-vm/glimmer-vm/tracerbench-results/artifact-1.html

[NullVoxPopuli]

Some lint fixes are needed, also this PR demonstrates a performance regression

[NullVoxPopuli]

Now the bench says things are faster...

[NullVoxPopuli]

Approving because in 3 benches, it seems this change has no impact

.. and i probably need to run benches locally because we're not able to trust the stability of the results.