Update supported ID token encryption algorithms to include ECDH-ES

Bug description

The default supported ID token encryption algorithms (OAuth 2 Provider settings > OpenID Connect) does not list any of the ECDH-ES algorithms, but we do actually support these since the secrets API work. This means that the OIDC discovery document will not list support for these algorithms by default.

How to reproduce the issue

Look at the default supported encryption algorithms

Expected behaviour

Should list:

• RSA1_5, RSA-OAEP, RSA-OAEP-256
• dir, A128KW, A192KW, A256KW
• ECDH-ES, ECDH-ES+A128KW, ECDH-ES+A192KW, ECDH-ES+A256KW

Current behaviour

• RSA1_5, RSA-OAEP, RSA-OAEP-256
• dir, A128KW, A192KW, A256KW

Work around

Manually add the ECDH algorithms to the list.

Code analysis

Config update required