chore: experimentation plugin version increment

[iamtarun99]

Fix JIRA-20990

Test URLs:

• Before: https://main--mammotome--hlxsites.aem.page/us/en/
• After: https://sites-20990-exp-plugin-version-increment--mammotome--hlxsites.aem.page/us/en/drafts/exp20990/

[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed.
In case there are problems, just click a checkbox below to rerun the respective action.

• Re-run PSI checks
• Re-sync branch

Commits

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[aem-code-sync]

Page	Scores	Audits	Google
/us/en/drafts/exp20990/

[solaris007]

@iamtarun99 is the drop in performance to 92 unavoidable?

[ramboz]

@solaris007 It's against a hlx.page since it's on a draft page… the perf on a hlx.live site will be higher

[solaris007]

@ramboz the PR template always pointed to .page and we always endeavored for getting close to 100 in these circumstances. are you saying we should make an exception due to experimentation's specificity?

[ramboz]

@solaris007 My point is that .hlx.page doesn't do the caching, so you have quite a bit of variance in the PageSpeed tests. A test against .hlx.live will be more stable and representative of the end user experience (CrUX).
The AEM boilerplate was updated a while back accordingly in adobe/aem-boilerplate@158e5c7 to address adobe/aem-boilerplate#269

On top of that, the experimentation engine does indeed impact the SI on the preview pages because it injects its overlay pill at the end of the lazy phase. So the initial viewport sees a late repaint which pushes the SI quite late.
If you are unhappy with the SI on preview pages, you would have 2 options:

• instrument the lazy phase of the plugin earlier
• add a query parameter flag to disable the UI for the tests

[solaris007]

@iamtarun99 @ramboz mind that mammotome is now on helix 5, including config service. i have merged main and adjusted the test URLs.