crypto: multiple webcrypto fixes

[panva]

While working on updating WPTs (#43421 put on hold) I have found the following issues.

• digest() invalid algorithm which happens to collide with other normalizeHashName names was accepted
• empty usages in generateKey() were accepted
• generateKey() publicExponent was not used
• deriveBits() ECDH / X25519 / X448 returned incorrect slice when non multiple of 8 length was requested
• generateKey() AES-KW accepted invalid usages

Review individual commits

[nodejs-github-bot]

Review requested:

• @nodejs/crypto

[tniessen]

Nice work!

[aduh95]

nit: the async wrapper is technically not needed (although it's fine to keep it if you prefer as is)

Suggested change

	(async()=>{
	awaitassert.rejects(subtle.digest('RSA-OAEP',Buffer.alloc(1)),{
	name: 'NotSupportedError',
	});
	})().then(common.mustCall());
	assert.rejects(subtle.digest('RSA-OAEP',Buffer.alloc(1)),{
	name: 'NotSupportedError',
	}).then(common.mustCall());