fixrule(element_orientation_unlocked, img_alt_valid, aria_accessiblename_exists, img_alt_null): fix issues related to the rules

[shunguoy]

• Rule bug: element_orientation_unlocked, img_alt_valid, aria_accessiblename_exists

This PR is related to the following issue(s):

• Fixes ACT b33eff: Checker rule element_orientation_unlocked marks failed test case #4 inapplicable  #1958
• Fixes ACT: Add fail reason to img_alt_null for conflicts in attributes and map to ACT rule 46ca7f #2013
• Fixes ACT 46ca7f: Element marked as decorative is not exposed - Expected failed, but returned passed #1938

Testing reference:

• test case for ACT b33eff: Checker rule element_orientation_unlocked marks failed test case #4 inapplicable  #1958: test/v2/checker/accessibility/rules/element_orientation_unlocked_ruleunit/act-fail4.html
• After the fix, an additional violation appears with the message: "The element is restricted to either landscape or portrait orientation using CSS transform property".
• test case for ACT: Add fail reason to img_alt_null for conflicts in attributes and map to ACT rule 46ca7f #2013: test/v2/checker/accessibility/rules/img_alt_null_ruleunit/Img-alt-arialabel.html
• After the fix, an additional NR appears with the message : "The image 'alt' attribute is empty, but the 'aria' label is not empty and overrides the 'alt' attribute".

I have conducted the following for this PR:

• I validated this code in Chrome and FF
• I validated this fix in my local env
• I provided details for testing
• This PR has been reviewed and is ready for test
• I understand that the title of this PR will be used for the next release notes.

Need to talk briefly

[philljenkins]

@ErickRenteria Tom is OK with pushing out this PR, but @shunguoy
is trying one more time to recreate the Puppeteer fail/environment. We'll add the "Ready for QA" (or move this back to draft) when we're done

[philljenkins]

Opening new issue against version of Puppeteer (used in automated ACT testing). v13 does not handle the CSS correctly while v20 does. This PR should proceed to QA