Auto merge of #25623 - nipunG314:25516, r=mrobinson

Refactor ServoParser Tokenizer to return TokenizerResult

As stated in  #25516, this PR refactors the feed functions in the following files to return an Option instead of a Result:

- components/script/dom/servoparser/async_html.rs
- components/script/dom/servoparser/html.rs
- components/script/dom/servoparser/xml.rs
- components/script/dom/servoparser/mod.rs

Originally, these functions were returning the Err values for situations that didn't actually result in an error. This PR fixes that.

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- [X] These changes fix #25516

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- [X] These changes do not require tests because it is a refactor.

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