perf(pnp): hoist data string

[merceyz]

What's the problem this PR addresses?

#3977 improved the startup time of the PnP hook but we can do more.

How did you fix it?

Hoist the data string to the top level to avoid V8 parsing it multiple times. https://v8.dev/blog/preparser

Benchmark results

Gatsby benchmark:

hyperfine -w 5 "node -r ./.pnp-before.cjs -e 1" "node -r ./.pnp-after.cjs -e 1"
Benchmark 1: node -r ./.pnp-before.cjs -e 1
  Time (mean ± σ):      52.4 ms ±   1.2 ms    [User: 53.3 ms, System: 8.7 ms]
  Range (min … max):    51.1 ms …  56.4 ms    57 runs

Benchmark 2: node -r ./.pnp-after.cjs -e 1
  Time (mean ± σ):      48.5 ms ±   0.5 ms    [User: 48.0 ms, System: 9.9 ms]
  Range (min … max):    47.5 ms …  49.7 ms    61 runs

Summary
  'node -r ./.pnp-after.cjs -e 1' ran
    1.08 ± 0.03 times faster than 'node -r ./.pnp-before.cjs -e 1'

Next.js repo:

hyperfine -w 5 "node -r ./.pnp-before.cjs -e 1" "node -r ./.pnp-after.cjs -e 1"
Benchmark 1: node -r ./.pnp-before.cjs -e 1
  Time (mean ± σ):     134.5 ms ±   0.9 ms    [User: 144.2 ms, System: 22.8 ms]
  Range (min … max):   132.6 ms … 137.4 ms    22 runs

Benchmark 2: node -r ./.pnp-after.cjs -e 1
  Time (mean ± σ):     110.6 ms ±   0.9 ms    [User: 120.9 ms, System: 22.1 ms]
  Range (min … max):   109.4 ms … 112.5 ms    26 runs

Summary
  'node -r ./.pnp-after.cjs -e 1' ran
    1.22 ± 0.01 times faster than 'node -r ./.pnp-before.cjs -e 1'

Checklist

• I have read the Contributing Guide.
• I have set the packages that need to be released for my changes to be effective.
• I will check that all automated PR checks pass before the PR gets reviewed.