Auto merge of #18670 - avadacatavra:interactive-metrics, r=jdm

added time to interactive metrics

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Added time to interactive metrics and refactored metrics/lib

I need to write tests, but wanted to submit the PR for review

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- [ ] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

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Cargo.lock

@@ -1820,10 +1820,13 @@ dependencies = [
  "gfx_traits 0.0.1",
  "ipc-channel 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "malloc_size_of 0.0.1",
+ "malloc_size_of_derive 0.0.1",
  "msg 0.0.1",
  "profile_traits 0.0.1",
  "script_traits 0.0.1",
  "servo_config 0.0.1",
+ "time 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]