fix(arborist): correctly load overrides on workspace edges, closes #4205

[nlf]

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[npm-robot]

found 20 benchmarks with statistically significant performance improvements

• app-large: clean, lock-only, cache-only, cache-only:peer-deps, modules-only, no-lock, no-cache, no-modules, no-clean, no-clean:audit
• app-medium: clean, lock-only, cache-only, cache-only:peer-deps, modules-only, no-lock, no-cache, no-modules, no-clean, no-clean:audit

timing results

app-large	clean	lock-only	cache-only	cache-only peer-deps	modules-only	no-lock	no-cache	no-modules	no-clean	no-clean audit
npm@8	60.564 ±4.65	28.471 ±0.08	23.977 ±7.54	18.167 ±0.94	2.492 ±0.03	2.520 ±0.01	2.104 ±0.08	10.481 ±0.20	2.022 ±0.01	3.093 ±0.00
#4327	0.379 ±0.01	0.364 ±0.00	0.369 ±0.01	0.370 ±0.02	0.356 ±0.01	0.383 ±0.00	0.375 ±0.01	0.345 ±0.00	0.365 ±0.02	0.347 ±0.00

app-medium	clean	lock-only	cache-only	cache-only peer-deps	modules-only	no-lock	no-cache	no-modules	no-clean	no-clean audit
npm@8	33.835 ±2.11	20.816 ±0.19	11.734 ±0.22	12.919 ±0.72	2.326 ±0.02	2.449 ±0.10	2.074 ±0.05	7.512 ±0.05	2.000 ±0.00	2.668 ±0.03
#4327	0.351 ±0.00	0.346 ±0.00	0.368 ±0.01	0.391 ±0.00	0.354 ±0.01	0.352 ±0.01	0.376 ±0.00	0.385 ±0.00	0.382 ±0.00	0.378 ±0.01