Invert default: use 2-stage transform, as the single stage transform is *hard*

[NullVoxPopuli]

From the embroider meeting on Tuesday, 2023-03-28

• double babel parse is costly + complicated
  • does need to be avoided for apps, but this rollup plugin is presently only for v2 addons
  • could be mitigated if the template-parser and preprocess plugin were written in rust (using SWC)
    • would be good to port transpilation to SWC anyway, vast speed improvements
• having the preprocess separate allows for only one babel parse (which is during normal babel transform) -- allowing this plugin to maybe work for apps later on

[changeset-bot]

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Latest commit: bf84978

The changes in this PR will be included in the next version bump.

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Name	Type
rollup-plugin-glimmer-template-tag	Minor

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