Dynamic tabs: use buttons rather than links (backport to v4) (#33163)

* Manually backport 32630

Dynamic tabs: use buttons rather than links

* Tweak unit test

* Tweak unit tests

* More tweakage

* show() should also bail if `disabled` attribute is set

* Tweak tests

* Simplify test for relatedTarget

* Temporarily remove problematic test

(as i can't get local tests to run just noww)

* Revert previous

* test: fix broken test cases for tab.js

* test: fix role=tablist invalid on nav element

* test: prefer <div/> over <div></div>

* Manually backport 32630

Dynamic tabs: use buttons rather than links

* test: fix broken test cases for tab.js

* Fixes

* Remove and ignore lock file

Co-authored-by: alpadev <alpa.muc@gmail.com>
Co-authored-by: Mark Otto <markd.otto@gmail.com>
Co-authored-by: Mark Otto <markdotto@gmail.com>

.gitignore

@@ -1,7 +1,8 @@
 # Ignore docs files
 /_site/
-# Hugo folders
+# Hugo files
 /resources/
+/.hugo_build.lock
 
 # Numerous always-ignore extensions
 *.diff