fix!: attrs like hx-vals not respecting disinherit

[alirezaalavi87]

Description

• All attributes including hx-vals now respect hx-disinherit and htmx.config.disableInheritance
• Write tests
• This is a breaking change since some people might have relied on the previous behavior of not respecting disinherit for those attrs

Corresponding issue: #1119

Testing

Manual testing:

I created a sample project and imported this updated htmx.js into it, and tested with such code snippets:

    <div hx-vals='{"foo": "bar"}' hx-confirm="fo sho?" hx-disinherit="hx-vals">
      <button hx-get="/test.html">click</button>
    </div>

Automated tests:

Added new tests with playwrite, testing the fixed issue and verifying that hx-vals respects disinheritance, both by configuration and by hx-disinherit on parent nodes.

Checklist

• I have read the contribution guidelines
• I have targeted this PR against the correct branch (master for website changes, dev for
  source changes)
• This is either a bugfix, a documentation update, or a new feature that has been explicitly
  approved via an issue
• I ran the test suite locally (npm run test) and verified that it succeeded

NOTE:
I used LLMs to help me understand the issue and write the tests and fixes. I spent ~2 hours reviewing and nitpicking on the changes and understanding them. I am not much aware of the internal workings of HTMX so there might be some things that I'm missing. But the previous tests and the new tests all passed. I tried my best for this to be high quality.