benchmark: update iterations of benchmark/assert/deepequal-buffer.js

[lucshi]

Fixes: #50571

Before applying this PR, the top functions are reading test JS file, instead of real logic code of "equal".
After increasing the iteration value, the test case behaved as expected to trigger equal.

Belowing is the benefit after changing the iterations which can reflect real performance and no much overhead for execution time.

<style> </style>

				before PR	after PR	benefit
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=0	strict=0	1102178.19	811018.53	136%
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=1	strict=0	2126510.614	1449499.9	147%
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=0	strict=1	1076920.796	824504.47	131%
assert/deepequal-buffer.js	method="notDeepEqual"	arrayBuffer=0	strict=1	1501014.19	1083974.3	138%
assert/deepequal-buffer.js	method="unequal_length"	arrayBuffer=0	strict=1	2474651.786	1541873.8	160%
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=1	strict=1	1451921.906	1044787.8	139%
assert/deepequal-buffer.js	method="notDeepEqual"	arrayBuffer=1	strict=1	2085341.463	1421480	147%
assert/deepequal-buffer.js	method="unequal_length"	arrayBuffer=1	strict=1	2894782.473	1801186.3	161%
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=0	strict=0	1073006.858	804104.05	133%
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=1	strict=0	2067498.834	1391137.1	149%
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=0	strict=1	1068874.391	809949.48	132%
assert/deepequal-buffer.js	method="notDeepEqual"	arrayBuffer=0	strict=1	1495734.765	1071242.3	140%
assert/deepequal-buffer.js	method="unequal_length"	arrayBuffer=0	strict=1	2474115.678	1539677.9	161%
assert/deepequal-buffer.js	method="deepEqual"	arrayBuffer=1	strict=1	1419495.005	1047928.8	135%
assert/deepequal-buffer.js	method="notDeepEqual"	arrayBuffer=1	strict=1	2054114.939	1394304.8	147%
assert/deepequal-buffer.js	method="unequal_length"	arrayBuffer=1	strict=1	2905970.911	1776728	164%