Fix switch statement break and continue return values

[raskad]

This Pull Request fixes the remaining "language/statements/switch" tests with exception of the tco tests.

It changes the following:

This removes the current behaviour of setting the return value to undefined whenever there is a break or continue statement at the start of a block. This was causing the return value to be unexpectedly overwritten in switch statements.
Instead this is now only implemented for catch and finally blocks where this behaviour mirrors the UpdateEmpty statements in the spec.

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	95,282	95,282	0
Passed	75,036	75,046	+10
Ignored	19,220	19,220	0
Failed	1,026	1,016	-10
Panics	0	0	0
Conformance	78.75%	78.76%	+0.01%

Fixed tests (10):

test/language/statements/switch/cptn-b-fall-thru-abrupt-empty.js [strict mode] (previously Failed)
test/language/statements/switch/cptn-b-fall-thru-abrupt-empty.js (previously Failed)
test/language/statements/switch/cptn-dflt-fall-thru-abrupt-empty.js [strict mode] (previously Failed)
test/language/statements/switch/cptn-dflt-fall-thru-abrupt-empty.js (previously Failed)
test/language/statements/switch/cptn-dflt-b-fall-thru-abrupt-empty.js [strict mode] (previously Failed)
test/language/statements/switch/cptn-dflt-b-fall-thru-abrupt-empty.js (previously Failed)
test/language/statements/switch/cptn-no-dflt-match-fall-thru-abrupt-empty.js [strict mode] (previously Failed)
test/language/statements/switch/cptn-no-dflt-match-fall-thru-abrupt-empty.js (previously Failed)
test/language/statements/switch/cptn-a-fall-thru-abrupt-empty.js [strict mode] (previously Failed)
test/language/statements/switch/cptn-a-fall-thru-abrupt-empty.js (previously Failed)

[codecov]

Codecov Report

Merging #3205 (bb1d0dd) into main (9665f8b) will increase coverage by 0.01%.
Report is 2 commits behind head on main.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##             main    #3205      +/-   ##
==========================================
+ Coverage   50.43%   50.44%   +0.01%     
==========================================
  Files         436      436              
  Lines       42531    42544      +13     
==========================================
+ Hits        21450    21461      +11     
- Misses      21081    21083       +2     

Files Changed	Coverage Δ
boa_engine/src/bytecompiler/mod.rs	66.58% <ø> (-0.35%)	⬇️
boa_engine/src/bytecompiler/statement/try.rs	91.01% <83.33%> (-1.40%)	⬇️

... and 1 file with indirect coverage changes

[Razican]

Looks good to me! Thanks :)

[HalidOdat]

Nice change! Just some small nitpicks :)

[HalidOdat]

Looks perfect to me :)