Improve openssl ext to generate EC keys with custom EC parameters

This change extends supported parameter when generating EC keys.

Specifically following parameters are now supporte

Improve openssl ext to generate EC keys with custom EC parameters

This change extends supported parameter when generating EC keys.

Specifically following parameters are now supported: p, a, b, order,
generator, seed, cofactory, g_x, g_y, x, y and d.

Those parameters can be passed to ec field in openssl_pkey_new options.

It also fixes some issues openssl_pkey_get_details related to SM2
support.

Closes GH-9991

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