chore(oidc): remove feature flag for introspection triggers (#10132)

# Which Problems Are Solved

Remove the feature flag that allowed triggers in introspection. This
option was a fallback in case introspection would not function properly
without triggers. The API documentation asked for anyone using this flag
to raise an issue. No such issue was received, hence we concluded it is
safe to remove it.

# How the Problems Are Solved

- Remove flags from the system and instance level feature APIs.
- Remove trigger functions that are no longer used
- Adjust tests that used the flag.

# Additional Changes

- none

# Additional Context

- Closes #10026 
- Flag was introduced in #7356

---------

Co-authored-by: Silvan <[email protected]>

console/src/assets/i18n/zh.json

@@ -1626,8 +1626,6 @@
       "LOGINDEFAULTORG_DESCRIPTION": "如果没有设置组织上下文，登录界面将使用默认组织的设置（而不是实例的设置）",
       "OIDCTOKENEXCHANGE": "OIDC 令牌交换",
       "OIDCTOKENEXCHANGE_DESCRIPTION": "启用 OIDC 令牌端点的实验性 urn:ietf:params:oauth:grant-type:token-exchange 授权类型。令牌交换可用于请求具有较少范围的令牌或模拟其他用户。请参阅安全策略以允许在实例上模拟。",
-      "OIDCTRIGGERINTROSPECTIONPROJECTIONS": "OIDC 触发内省投影",
-      "OIDCTRIGGERINTROSPECTIONPROJECTIONS_DESCRIPTION": "在内省请求期间启用投影触发器。如果内省响应中存在明显的一致性问题，这可以作为一个解决方法，但可能会影响性能。我们计划在未来删除内省请求的触发器。",
       "USERSCHEMA": "用户架构",
       "USERSCHEMA_DESCRIPTION": "用户架构允许管理用户的数据架构。如果启用此标志，您将可以使用新的 API 及其功能。",
       "ACTIONS": "操作",