Use new Chrome --headless=new option in testing

[david-yz-liu]

Motivation and Context

Trying out this new option. Ref teamcapybara/capybara#2726.

Your Changes

Description: Set Selenium tests to use --headless=new Chrome option.

Type of change (select all that apply):

• Test update (change that modifies or updates tests only)

Testing

Opened this PR and checked that the tests pass.

Checklist

• I have performed a self-review of my own code.
• I have verified that the pre-commit.ci checks have passed.
• I have verified that the CI tests have passed.
• I have reviewed the test coverage changes reported on Coveralls.

[coveralls]

Pull Request Test Coverage Report for Build 8131963564

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 91.771%

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Totals
Change from base Build 8131934753:	0.0%
Covered Lines:	39137
Relevant Lines:	42024

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💛 - Coveralls