Apply the shared script nonceability check to parser scripts, buffered preloads and runtime script preparation. Suspicious script attribute names and values must not authorize execution merely because a nonce matches. Includes parser, preload and dynamic-preparation regressions.
The attribute checks follow the [CSP3 nonceability algorithm](https://www.w3.org/TR/CSP3/#is-element-nonceable), including case-insensitive `<link`, `<script` and `<style` matches and parser duplicate attributes.
Validation: all branch checks passed. Summary [ 115.690s] 18925 tests run: 18925 passed (9 slow), 16 skipped
ldm0