Support public OIDC clients
- Enables support for public OIDC clients by only checking for a client
ID being set. This allows for confidential and public clients to be used
with Coder's OIDC authentication.
- Also adds a public client configuration to the development OIDC setup
script.
Fixes#16135
Change-Id: Iadd85d40c2faa595a0498e25d3407a1f94b5c8a8
Signed-off-by: Thomas Kosiewski <tk@coder.com>
Signed-off-by: Thomas Kosiewski <tk@coder.com>