Combine HasProperty and Get operations when possible

[raskad]

This PR creates a new object operation that combines the HasProperty and Get operations.

In some cases in the spec HasProperty and Get are called on an object, with the same arguments, directly following each other. Both operations boil down to (in most cases) [[GetOwnProperty]], just that HasProperty does not return the value. To avoid duplicating the exact same operations we can combine both operations.

I have some Flame Graphs from a GetName operation to visualize the benefit:

Before:

After:

I also ran the benchmarks:

Before:

RESULT Richards 54.3
RESULT DeltaBlue 58.2
RESULT Crypto 68.4
RESULT RayTrace 186
RESULT EarleyBoyer 170
RESULT RegExp 58.6
RESULT Splay 195
RESULT NavierStokes 159
SCORE 103

After:

RESULT Richards 55.1
RESULT DeltaBlue 59.6
RESULT Crypto 68.1
RESULT RayTrace 187
RESULT EarleyBoyer 176
RESULT RegExp 58.5
RESULT Splay 195
RESULT NavierStokes 160
SCORE 104

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	50,213	50,213	0
Passed	42,981	42,981	0
Ignored	1,411	1,411	0
Failed	5,821	5,821	0
Panics	0	0	0
Conformance	85.60%	85.60%	0.00%

[jedel1043]

Really nice optimization! I'm seeing that all our usages of the new method are made internally, so I was curious if we could set up inline caching manually to optimise the calls even more.

EDIT: cc @HalidOdat

[HalidOdat]

Yeah that was one of the things that could be optimized, though I didn't find a good way of doing it, one potentially viable idea I had was to have a global hash table on the context (with limited entries).

[HalidOdat]

Looks good to me! :)