fix(crypto): throw DataError, not TypeError, for JWK missing kty

[VirtualTim]

According to the spec a missing kty should throw a DataError, not TypeError.
Found when looking at the crypto tests post-#326.

From https://w3c.github.io/webcrypto/#concept-parse-a-jwk:

When this specification says to parse a JWK, the user agent must run the following steps:
[...]
6. If the kty field of key is not defined, then throw a DataError.

From https://w3c.github.io/webcrypto/#rsassa-pkcs1-operations-import-key:

3. If the kty field of jwk is not a case-sensitive string match to "RSA", then throw a DataError.

From https://w3c.github.io/webcrypto/#ecdsa-operations-import-key:

3. If the kty field of jwk is not "EC", then throw a DataError.

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Marking as a draft, as this should be rebased on top of #326, and text expectations should be updated with WPT_FLAGS="--update-expectations".