build: replace npx with lockfile-pinned binaries (#50598)
* build: replace npx with lockfile-pinned binaries
- nan-spec-runner: reorder yarn install first, invoke nan node-gyp bin directly
- publish-to-npm: use host npm with E404 try/catch (closes existing TODO)
- upload-symbols: add @sentry/cli devDep, invoke from node_modules/.bin
- remove script/lib/npx.py (dead since #48243)
* build: bump @sentry/cli to 1.70.0 for arm support
* build: bump @sentry/cli to 1.72.0, skip CDN download on test jobs
@sentry/cli fetches its platform binary from Sentry CDN at postinstall.
Only upload-symbols.py (release pipeline) needs the binary; set
SENTRYCLI_SKIP_DOWNLOAD=1 in the two test-segment workflows that
call install-dependencies. The 64k variant uses pre-built artifacts
and does not install deps.
