fix: fix condition for extracting children getter

[ravijayaramappa]

Details

The condition to extract children descriptor from Element.prototype or HTMLElement.prototype has a bug. It is checking the wrong property
Backport of #1039

Does this PR introduce a breaking change?

• Yes
• No

[salesforce-best-lwc-internal]

Benchmark results

Base commit: 3dacbd7 | Target commit: cbf704d

lwc-engine-benchmark

table-append-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table/append/1k	duration	151.20 (±4.75 ms)	150.25 (±3.85 ms)	-0.9ms (0.6%) 👌

table-clear-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table/clear/1k	duration	5.90 (±0.40 ms)	6.10 (±0.30 ms)	+0.2ms (3.4%) 👎

table-create-10k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table/create/10k	duration	875.05 (±5.45 ms)	915.65 (±4.80 ms)	+40.6ms (4.6%) 👎

table-create-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table/create/1k	duration	117.85 (±3.10 ms)	120.90 (±3.60 ms)	+3.1ms (2.6%) 👎

table-update-10th-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table/update-10th/1k	duration	83.80 (±3.15 ms)	77.15 (±3.00 ms)	-6.6ms (7.9%) 👌

tablecmp-append-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-component/append/1k	duration	235.80 (±18.30 ms)	255.75 (±6.60 ms)	+19.9ms (8.5%) 👎

tablecmp-clear-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-component/clear/1k	duration	12.10 (±1.90 ms)	12.85 (±1.55 ms)	+0.8ms (6.2%) 👌

tablecmp-create-10k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-component/create/10k	duration	1731.95 (±10.80 ms)	1752.00 (±11.55 ms)	+20.0ms (1.2%) 👎

tablecmp-create-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-component/create/1k	duration	206.80 (±3.40 ms)	212.95 (±5.15 ms)	+6.1ms (3.0%) 👎

tablecmp-update-10th-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-component/update-10th/1k	duration	71.25 (±4.55 ms)	71.55 (±4.65 ms)	+0.3ms (0.4%) 👌

wc-append-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-wc/append/1k	duration	257.95 (±4.70 ms)	260.40 (±5.35 ms)	+2.4ms (0.9%) 👎

wc-clear-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-wc/clear/1k	duration	22.05 (±1.80 ms)	22.50 (±2.15 ms)	+0.5ms (2.0%) 👌

wc-create-10k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-wc/create/10k	duration	1992.90 (±15.65 ms)	2015.80 (±9.60 ms)	+22.9ms (1.1%) 👎

wc-create-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-wc/create/1k	duration	220.95 (±4.15 ms)	228.50 (±5.25 ms)	+7.6ms (3.4%) 👎

wc-update-10th-1k	metric	base(3dacbd7)	target(cbf704d)	trend
benchmark-table-wc/update-10th/1k	duration	68.65 (±4.95 ms)	73.05 (±5.65 ms)	+4.4ms (6.4%) 👎