Closes #1634.

Add a test covering the behavior of SingleLineHTMLCloseComment where the LineTerminatorSequence within is either Unicode separator code point. (#1612)

- "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)

Early errors may result from parsing the source text of a test file, but
they may also result from parsing some other source text as referenced
through the ES2015 module syntax. The latter form of early error is not
necessarily detectable by ECMAScript parsers, however. Because of this,
the label "early" is not sufficiently precise for all Test262 consumers
to correctly interpret all tests.

Update the "phase" name of "early" to "parse" for all those negative
tests that describe errors resulting from parsing of the file's source
text directly. A forthcoming commit will update the remaining tests to
use a "phase" name that is more specific to module resolution.

Modify $262.uncallableAndIsHTMLDDA() to an optional $262.IsHTMLDDA (whose use must be guarded by a feature of the same name), and narrowly/correctly prescribe its requirements consistent with `document.all`'s behavior in HTML. 

Fix a minor error-message typo, and include the thrown error in the TypeError-testing error message.

Add a test for GetIterator(obj, ~async~) attempting to call obj[@@asyncIterator] even if that value is an object with an [[IsHTMLDDA]] internal slot.

Add tests for the case of <iterator>.return, as used in the iteration protocol, being an object that's uncallable and compares equal to `undefined`.

This pattern makes expectations more explicit by making test files more
literal.

Ref https://github.com/tc39/ecma262/issues/815
Ref https://github.com/tc39/ecma262/pull/889

This is testing the current semantics of the specs, rather than the semantics in the proposed referenced issue.

Fixes #904

Authored via the following command:

   $ find test -type f -print0 | \
       xargs -0 sed \
         -i 's/^\(\s*\)negative:\s*SyntaxError\s*$/\1negative:\n\1  phase: early\n\1  type: SyntaxError/g'

The expected errors in these tests cannot be asserted with the
`assert.throws` helper function for various reasons. Re-format their
meta-data according to the latest design in order to more precisely
describe test expectations.

These were re-introduced in sloppy mode per
https://github.com/tc39/ecma262/pull/614

* Re-generate tests

The test generation tool has been modified in the time since these tests
were first generated and committed to the project. Re-generate the tests
using the latest version of the tool.

* Add test cases for Annex B hoisting disqualifiers

The "variable-like" function hoisting semantics defined in Annex B
extension B.3.3 is only applied if "[...] replacing the
FunctionDeclaration f with a VariableStatement that has F as a
BindingIdentifier would not produce any Early Errors [...]". Test262
previously included tests for this condition when the disqualifying
early error originated from the ScriptBody and FunctionBody productions.

Add test cases to assert the behavior when it is disqualified by all
other relevant early errors: Block statements, `for` statements,
`for-of` statements, `for-in` statements, and Switch statements.

* Generate tests

* fixup! Add test cases for Annex B hoisting disqualifiers

* fixup! Add test cases for Annex B hoisting disqualifiers

Correct test case "info" meta-data.

* fixup! Add test cases for Annex B hoisting disqualifiers

Improve test bodies

* fixup! Generate tests

Extend test for HTML comments

The V8 engine incorrectly requires a leading newline character for
MultiLineComments which contain the optional trailing HTMLCloseComment
[1]. Extend the current tests to fail when such an invalid restriction
is in place.
[1] https://bugs.chromium.org/p/v8/issues/detail?id=5142

Remove previously-existing tests in favor of new versions that are more
complete and more appropriately named.