feat(config): warn on deprecated configs

[lukekarrys]

Leaving as a draft until npm/config#62 is published and then this PR will also include that dep update.

[npm-robot]

no statistically significant performance changes detected

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	60.939 ±1.68	36.426 ±0.07	22.366 ±0.11	26.135 ±0.72	3.783 ±0.06	3.784 ±0.07	2.979 ±0.07	15.602 ±0.14	2.996 ±0.02	4.100 ±0.09
#4740	79.210 ±24.73	42.339 ±7.48	22.659 ±0.34	25.442 ±0.12	3.670 ±0.05	3.680 ±0.04	2.934 ±0.01	15.495 ±0.02	2.898 ±0.05	4.246 ±0.04

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	44.959 ±2.43	28.450 ±0.08	16.736 ±0.13	17.701 ±0.21	3.366 ±0.02	3.380 ±0.04	2.942 ±0.01	11.174 ±0.03	2.789 ±0.01	3.814 ±0.04
#4740	45.027 ±0.30	32.052 ±4.72	17.125 ±0.27	17.868 ±0.54	3.362 ±0.05	3.351 ±0.04	3.028 ±0.16	11.268 ±0.20	2.795 ±0.05	3.817 ±0.01