feat: use v3 lockfiles by default

[fritzy]

Lockfile now default to v3 with the following behavior:

• existing v1 lockfiles always get upgraded (unless --lockfile-version=1)
• existing lockfiles get changed if --lockfile-version is set
• hidden lockfiles are always v3
• fixed bugs in lockfile version bootstrapping churn

[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	42.935 ±0.14	20.119 ±0.81	17.914 ±0.01	24.983 ±5.36	3.807 ±0.31	3.566 ±0.11	2.888 ±0.03	13.156 ±0.04	2.665 ±0.06	4.844 ±1.30
#5605	46.164 ±1.84	20.662 ±0.14	18.940 ±0.05	23.807 ±3.00	3.572 ±0.01	3.537 ±0.04	2.811 ±0.02	13.379 ±0.08	2.740 ±0.06	4.548 ±0.92

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	33.618 ±1.92	15.753 ±0.17	14.311 ±0.11	16.556 ±0.45	3.061 ±0.03	2.966 ±0.02	2.681 ±0.08	9.836 ±0.05	2.579 ±0.02	3.550 ±0.10
#5605	32.484 ±1.01	16.571 ±0.08	14.779 ±0.10	16.023 ±0.39	2.967 ±0.01	3.034 ±0.01	2.714 ±0.09	10.424 ±0.21	2.545 ±0.00	3.318 ±0.01

[ruyadorno]

this looks great @fritzy 🎉