feat(install-scripts): use install-scripts as the warning log title

[manzoorwanijk]

Renames the warning log title for install-script-policy messages from allow-scripts to install-scripts, so npm install prints npm warn install-scripts … to match the npm install-scripts command namespace.

Only the log title changes. The allowScripts package.json field, the allow-scripts config (and the command static params that declare it), and message-body text that names the config are all left as-is.

Affected emitters: reify-output.js (the post-install blocked-scripts summary), resolve-allow-scripts.js (policy precedence/validation warnings), warn-workspace-allow-scripts.js, and allow-scripts-writer.js.

References

Follows up #9629

BEFORE	AFTER

[manzoorwanijk]

@owlstronaut, it won't apply cleanly to release/v11, so here is the backport change ready #9698.

[JamieMagee]

LGTM 👍