fix(crypto): normalize P-521 SPKI exports

[fibibot]

Fixes #34044

This normalizes imported compressed P-521 EC public keys when exporting SPKI, matching Node.js output for crypto.subtle.exportKey("spki"). It also removes the stale WPT expected-failure entries for the P-521 compressed import cases that now pass.

Closes bartlomieju/orchid-inbox#91

Tests:

• deno eval 'JSON.parse(Deno.readTextFileSync("tests/wpt/runner/expectations/WebCryptoAPI.json")); console.log("ok")'
• deno fmt --check tests/wpt/runner/expectations/WebCryptoAPI.json tests/unit/webcrypto_test.ts
• deno lint tests/unit/webcrypto_test.ts
• cargo fmt --check -p deno_crypto
• cargo check -p deno_crypto

[bartlomieju]

@fibibot which issue does this fix? It isn't the issue you linked...

[lunadogbot]

You are right. I initially linked the inbox tracking issue and had the wrong branch contents on this PR.

I replaced the PR with the actual fix for #34044, which was the issue from your @fibibot please fix comment. The PR body now links that issue directly.