Auto merge of #25405 - pshaughn:minmaxstep, r=jdm

make stepUp, stepDown, valueAsNumber, valueAsDate, and list work in HTMLInputElement

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Steppy operation of input elements now functions. A few related tests still fail because of incorrect test expectations. A couple range reftests fail on what might be correct expectations; solving that involves layout, not DOM.
Main changes here:
- str.rs now has its datetime format parsers public, with some changes to align their output with chrono::NaiveDateTime and fix a bug in milliseconds validation
- HTMLInputElement has new attributes, and code behind them for relevant concepts
- servoparser/mod.rs now has some extra code to ensure that input sanitization happens at the right moment during input element creation; the spec is non-specific about when this happens, but it has to happen somewhere and in #21952 @Eijebong had independently come to the same conclusion as me about the timing.
- Some tests are added where WPT wasn't already testing functionality I was adding; Firefox and Chrome pass them, Safari fails some in a reasonably expected way
- Lots of test metadata changed to passing

One test continues to fail because 0.1 * 6 != 0.6 and the spec is written in abstractions instead of actual floating-point numbers; other test failures are WPT bugs I've reported as such and will write fixes for soon if no one else does.

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #25390 and fix #25388 and fix #19773 (except validation doesn't exist) and fix #25386

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- [X] There are tests for these changes OR

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