Added tests of relational comparison among BigInt and boolean

Some of these are based on work by André Bargull in
<https://bugzilla.mozilla.org/show_bug.cgi?id=1433303>.

Various test cases for cross-browser compliance bugs

Defines $262.agent.monotonicNow()

Remove superfluous code from negative syntax tests

Because these files contain syntax errors, the code they contain is not
intended to be executed, and the runtime semantics are therefore
irrelevant. Simplify the files by removing the unnecessary code.

Fix yaml formatting

Completes gh-1472

Make parseTestRecord.py python3 compatible

Fix various test bugs

- "CannotSuspendMainAgent" feature was changed to "CanBlockIsFalse" flag
- Move annex-b tests into annex-b directory
- Update variable names in nonshared-int-views.js tests
- Move getReport() call in nan-for-timeout.js to avoid iloop
- Update BigInt constructor to match new semantics (tc39/proposal-bigint#138)

Fixes gh-1453

wip: atomics wake + additional wait tests

additional test coverage for atomics.wait + removing old tests which have been replaced + test cleanup and renaming test files for consistency

Related to https://github.com/tc39/ecma262/pull/1177

Corrections to sec-web-compat-evaldeclarationinstantiation and sec-web-compat-functiondeclarationinstantiation tests. Fixes gh-1364 (#1509)

test BigInt toString with default radix

cross-realm test for BigInt.prototype.valueOf

remove IsSafeInteger checks for BigInt

* relational comparison of bigint and string values

* additional tests for strings converted to NaN

Thanks to Jeff Walden for suggesting this test case.

Thanks to Jeff Walden for suggesting this test case.