Invalid settings from VK_EXT_layer_settings are not reported

[elasota]

Environment:

• OS: Windows 10
• GPU and driver version: AMD Radeon RX 6700, driver 24.9.1
• SDK or header version if building from repo: 1.3.296.0

Describe the Issue
If a setting is supplied VK_EXT_layer_settings that is not actually supported by the validation layer, no warning message is generated. Since VK_EXT_layer_settings itself doesn't supply a reflection API to enumerate settings, there isn't really a way to validate that the settings being passed were correct.

Passing values with the wrong type also results in unusual behavior, e.g. passing "thread_safety" with the type set to VK_LAYER_SETTING_TYPE_INT32_EXT results in the setting being disabled.

Expected behavior
Passing an unsupported or incorrectly-typed setting should produce a warning.

Valid Usage ID
There does not appear to be a VUID for this.