`function nan() { return /* expression to compute NaN */ }` may not return the same implementation-distinguishable NaN value before and after JIT compilation.

Fixes #1492

Fixes gh-1476
Closes gh-1484

test/built-ins/TypedArray/prototype/fill/BigInt/fill-values-conversion-once.js
- Should refer to BigInt conversion instead of ToNumber

test/built-ins/TypedArray/prototype/fill/BigInt/fill-values-non-numeric.js
- Missing coverage for non-convertable values like undefined or null?
- added fill-values-non-numeric-throw.js

test/built-ins/TypedArray/prototype/set/BigInt/array-arg-return-abrupt-tointeger-offset-symbol.js
- Change [1] to [1n] to avoid possible false-positives because ToBigInt(1) also throws a TypeError.
- Issue also present in other set() tests.

BigInt: Add tests for BigInt conversions in TypedArray prototype/set and TypedArray internal [[set]] (#1478)

* BigInt: Add tests for BigInt conversions in prototype/set

* BigInt: add conversion tests for internal [[set]]

+whitespace

* Fix bad references on tests for BigInt TypedArrays

* Remove bad conversions for BigInt TypedArray

* Cleanup the BigInt TypedArray harness file

Remove non used code (testBigIntTypedArrayConversions)

Move the constructors list to inside the exposed function, this prevents early implementations to fail before the function is called.

* Fix bad references in TypedArrays.of (BigInt)

* Remove BigInt tests from typedarray harness test

* Use BigInt for BigInt typedArrays

* Apply last fixings on BigInt TypedArray tests

* Apply fixes to last revision from @anba

- optimize file names
- BigInt folder for TAs.from and of
- copy tests preparing for bigint
- copy ta prototype methods for bigint
- Use an exclusive harness for bigint typedarrays
- add features
- use proper harness
- use preper harness
- Restore original tests for TypedArrays
- final fixes
- fix includes

- add @jakobkummerow's changes
- remove EOL whitespace
- use 'Array.isArray' instead of 'instanceof Array'
- check for BigInt type in toLocaleString tests
- specify TypedArray constructor list for non-BigInt tests
- update TypedArray harness test for BigInt
- add a missing type coercion
- disable more tests for Big(U)Int64Array
- check for BigInt before using BigInt TypedArray constructors

This reverts commit a01de4a7.

features: update all features flags for all test files with harness/* deps that require a feature flag

Array.prototype.sort and %TypedArray%.prototype.sort should throw on a non-undefined non-function (#1059)

Per https://github.com/tc39/ecma262/pull/785/

The change is proposed in https://github.com/tc39/ecma262/pull/856
as a fix to https://github.com/tc39/ecma262/issues/855

Here, the ToNumber coercion is done only once, rather than on each
iteration. It does not appear that there were previously any
tests against repeated coercion for this parameter previously.

Tested this test against V8, which failed, as V8 implements the
current spec rather than the proposed one.

ToInteger can result in the values +Infinity and -Infinity.