op-node: Remove TryUpdateEngine event

[mslipper]

Removes the TryUpdateEngine event. The BuildStarted and Envelope fields were never populated, so all of the metrics collection logic was unused. This made for a pretty clean refactor.

I'll try the other Try* family of events in a subsequent PR - I bet they'll be similar in scope.

[codecov]

Codecov Report

❌ Patch coverage is 54.54545% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 44.54%. Comparing base (6683f1a) to head (f1c1421).
⚠️ Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
op-node/rollup/engine/engine_controller.go	55.55%	5 Missing and 3 partials ⚠️
op-node/rollup/driver/state.go	0.00%	1 Missing ⚠️
op-node/rollup/engine/api.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #17096      +/-   ##
===========================================
- Coverage    45.37%   44.54%   -0.83%     
===========================================
  Files         1478     1423      -55     
  Lines       119990   115286    -4704     
===========================================
- Hits         54444    51354    -3090     
+ Misses       61718    60248    -1470     
+ Partials      3828     3684     -144     

Flag	Coverage Δ
cannon-go-tests-64	?
contracts-bedrock-tests	96.29% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
op-node/rollup/driver/driver.go	0.00% <ø> (ø)
op-node/rollup/engine/events.go	96.07% <ø> (+37.83%)	⬆️
op-node/rollup/engine/payload_success.go	100.00% <100.00%> (+8.82%)	⬆️
op-node/rollup/driver/state.go	0.00% <0.00%> (ø)
op-node/rollup/engine/api.go	43.80% <0.00%> (ø)
op-node/rollup/engine/engine_controller.go	78.51% <55.55%> (+5.40%)	⬆️

... and 65 files with indirect coverage changes

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