newrule(svg_graphics_labelled): Create a new rule to check the accessible name of an SVG element

[shunguoy]

• New Rule(s): svg_graphics_labelled
• New or modified help files: svg_graphics_labelled

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

fixes: #1471
fixes: #1905 Help

Testing reference:

test case: test/v2/checker/accessibility/rules/svg_graphics_labelled_ruleunit/svg_nested_all_fail.html
Three violations reported for the SVG elements: The SVG element has no accessible name

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.

New test item

• Make sure to add a check for the Checker rule sets tab content to the Test for Done in the next rollout of the rules. The check will be to confirm that 7.3 appears as a new tab. This new/additional test step is mentioned in https://github.ibm.com/IBMa/E2E/issues/6463 NA for this PR

[drjoho]

Reviewed all files. No obvious errors.

[ErickRenteria]

Validated