Accessibility - Search Profiler page needs couple of accessibility fixes.

[rashmivkulkarni]

Kibana version: 8.0

Elasticsearch version: 8.0

Xpack > Search Profiler > When I run the axe plugin on Search Profiler page , I found errors on the page Ex: Ensures every form element has a label

Trying to write an automated test for the search profiler page to run it via a11y tool and here is the console output for the first test

  1) Accessibility Search Profiler Editor
       "before all" hook for "input the JSON in the aceeditor":
     Error: a11y report:

VIOLATION
  [label]: Ensures every form element has a label
    Help: https://dequeuniversity.com/rules/axe/3.5/label?application=axeAPI
    Elements:
      - textarea
      at Accessibility.testAxeReport (/Users/rashmikulkarni/my_workspace/kibana/test/accessibility/services/a11y/a11y.ts:85:15)
      at Accessibility.testAppSnapshot (/Users/rashmikulkarni/my_workspace/kibana/test/accessibility/services/a11y/a11y.ts:58:18)
      at process._tickCallback (internal/process/next_tick.js:68:7)

     └- ✖ fail: "Accessibility Search Profiler Editor "before all" hook for "input the JSON in the aceeditor""
     │
     └-> "after all" hook

[elasticmachine]

Pinging @elastic/es-ui (Team:Elasticsearch UI)