fix: don't fail immediately if cache dir is not accessible

[lukekarrys]

This also changes all the log messages about not being able to create
initial directories and files to log.verbose since we know run those
commands on init. There are a lot of valid reasons why those might fail,
and we don't want to show a warning for them every time.

Fixes: #4769
Fixes: #4838
Fixes: #4996

[lukekarrys]

Need to add a test for this, obviously. 😶‍🌫️

[npm-cli-bot]

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	42.893 ±7.21	17.217 ±0.30	15.602 ±0.21	19.056 ±2.30	2.571 ±0.12	2.638 ±0.07	2.072 ±0.02	10.832 ±0.37	2.065 ±0.07	3.434 ±0.48
#5197	45.685 ±0.82	17.918 ±0.12	15.719 ±0.04	19.138 ±1.18	2.689 ±0.03	2.607 ±0.02	2.131 ±0.05	10.915 ±0.23	2.146 ±0.01	3.368 ±0.35

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	27.559 ±0.88	13.271 ±0.10	11.660 ±0.34	13.051 ±0.49	2.414 ±0.11	2.397 ±0.08	2.164 ±0.00	7.922 ±0.16	2.017 ±0.04	2.905 ±0.02
#5197	27.391 ±1.15	13.307 ±0.22	11.742 ±0.23	12.873 ±0.49	2.378 ±0.07	2.461 ±0.03	2.162 ±0.06	8.051 ±0.24	2.048 ±0.04	2.820 ±0.01

[vojty]

Could you please release a new version with this?

[wraithgar]

@vojty releases happen weekly on Wednesday. https://github.com/npm/cli/wiki/Release-Process-(v8)