chore(dashboards): Reduce instrumentation for AutoSizedText

[gggritso]

Rollout's basically done, this is the last thing. I don't want to create transactions for every resize, that's too much noise.

1. Remove some unnecessary tags (e.g., iteration exceeded) since that condition has mostly disappeared. The iteration count makes the same point
2. Do not create a transaction. In fact, do the opposite: attach a span to an existing transaction if it exists, otherwise just drop it, it's okay
3. Remove custom duration measurements. This has done its job, and it wasn't nearly as relevant for span durations as transaction durations anyway

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 16 lines in your changes missing coverage. Please review.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
.../app/views/dashboards/widgetCard/autoSizedText.tsx	0.00%	16 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #77597       +/-   ##
===========================================
- Coverage   88.40%   78.05%   -10.35%     
===========================================
  Files        2998     6981     +3983     
  Lines      186501   308732   +122231     
  Branches    30640    50594    +19954     
===========================================
+ Hits       164878   240986    +76108     
- Misses      15598    56056    +40458     
- Partials     6025    11690     +5665     

[narsaynorath]

👍