[llvm] [llvm-cov][CoverageView] minor fix/improvement to HTML and text coverage output (PR #80952)

[Wentao Zhang via llvm-commits]

whentojump wrote:

The tests should have be fixed.

Basically change the expected HTML output accordingly (due to commit `[llvm-cov][CoverageViewHTML] remove name="Ln" attribute in the link within MC/DC views`) and remove the `name` attribute as well

https://github.com/llvm/llvm-project/pull/80952