Bug 1738815: Move quicksuggest tests into own dir. r=adw

.eslintrc.js

browser/components/urlbar/moz.build

browser/components/urlbar/tests/browser/browser.ini

browser/components/urlbar/tests/browser/head-common.js

browser/components/urlbar/tests/browser/quicksuggest.sjs

...nents/urlbar/tests/quicksuggest/QuickSuggestTestUtils.jsm

.../components/urlbar/tests/quicksuggest/browser/browser.ini

...urlbar/tests/quicksuggest/browser/browser_quicksuggest.js

...uicksuggest/browser/browser_quicksuggest_configuration.js

...ests/quicksuggest/browser/browser_quicksuggest_indexes.js

...ksuggest/browser/browser_quicksuggest_onboardingDialog.js

...ts/quicksuggest/browser/browser_quicksuggest_telemetry.js

browser/components/urlbar/tests/quicksuggest/browser/head.js

...bar/tests/quicksuggest/browser/searchSuggestionEngine.sjs

...bar/tests/quicksuggest/browser/searchSuggestionEngine.xml

...ponents/urlbar/tests/quicksuggest/browser/subdialog.xhtml

browser/components/urlbar/tests/quicksuggest/unit/head.js

...nents/urlbar/tests/quicksuggest/unit/test_quicksuggest.js

.../tests/quicksuggest/unit/test_quicksuggest_keywordtree.js

...rlbar/tests/quicksuggest/unit/test_quicksuggest_merino.js