fix(dependency): Issue with kork-web while upgrading spring-boot to 2.5.14

While upgrading the spring-boot, the compilation of kork-web module failed with following error:
```
> Task :kork-web:compileGroovy FAILED
/kork/kork-web/src/main/java/com/netflix/spinnaker/kork/web/controllers/GenericErrorController.java:41: error: incompatible types: Boolean cannot be converted to ErrorAttributeOptions
        errorAttributes.getErrorAttributes(webRequest, includeStackTrace);
                                                       ^
```

```
/kork/kork-web/src/main/java/com/netflix/spinnaker/kork/web/controllers/GenericErrorController.java:51: error: method does not override or implement a method from a supertype
  @OverRide
  ^
```

```
> Task :kork-web:compileGroovy
/kork/kork-web/src/main/java/com/netflix/spinnaker/kork/web/selector/v2/SelectableService.java uses unchecked or unsafe operations.
startup failed:
/kork/kork-web/src/main/groovy/com/netflix/spinnaker/config/ErrorConfiguration.groovy: 37: Method 'getErrorAttributes' from class 'com.netflix.spinnaker.config.ErrorConfiguration$1' does not override method from its superclass or interfaces but is annotated with @OverRide.
 @ line 37, column 7.
         @OverRide
         ^
```
The root cause is the deprecation of following methods in Spring boot 2.3.x and now removal of code from spring boot 2.5.x:

ErrorAttributes.getErrorAttributes(ServerRequest, boolean)
spring-projects/spring-boot@158933c    spring-projects/spring-boot#21324

ErrorController.getErrorPath()
spring-projects/spring-boot#19844

Fixed the issue with required code changes.

Author: j-sandy

kork-web/src/main/groovy/com/netflix/spinnaker/config/ErrorConfiguration.groovy

@@ -22,6 +22,7 @@ import com.netflix.spinnaker.kork.web.exceptions.ExceptionMessageDecorator
 import com.netflix.spinnaker.kork.web.exceptions.ExceptionSummaryService
 import com.netflix.spinnaker.kork.web.exceptions.GenericExceptionHandlers
 import org.springframework.beans.factory.ObjectProvider
+import org.springframework.boot.web.error.ErrorAttributeOptions
 import org.springframework.boot.web.servlet.error.DefaultErrorAttributes
 import org.springframework.boot.web.servlet.error.ErrorAttributes
 import org.springframework.context.annotation.Bean
@@ -35,10 +36,10 @@ class ErrorConfiguration {
     final DefaultErrorAttributes defaultErrorAttributes = new DefaultErrorAttributes()
     return new ErrorAttributes() {
       @Override
-      Map<String, Object> getErrorAttributes(WebRequest webRequest, boolean includeStackTrace) {
+      Map<String, Object> getErrorAttributes(WebRequest webRequest, ErrorAttributeOptions includeStackTrace) {
         // By default, Spring echoes back the user's requested path. This opens up a potential XSS vulnerability where a
         // user, for example, requests "GET /<script>alert('Hi')</script> HTTP/1.1".
-        Map<String, Object> errorAttributes = defaultErrorAttributes.getErrorAttributes(webRequest, includeStackTrace)
+        Map<String, Object> errorAttributes = defaultErrorAttributes.getErrorAttributes(webRequest, includeStackTrace.getIncludes().contains(ErrorAttributeOptions.Include.STACK_TRACE))
         errorAttributes.remove("path")
         return errorAttributes
       }

kork-web/src/main/java/com/netflix/spinnaker/kork/web/controllers/GenericErrorController.java

@@ -18,6 +18,7 @@
 
 import com.netflix.spinnaker.kork.exceptions.HasAdditionalAttributes;
 import java.util.Map;
+import org.springframework.boot.web.error.ErrorAttributeOptions;
 import org.springframework.boot.web.servlet.error.ErrorAttributes;
 import org.springframework.boot.web.servlet.error.ErrorController;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -33,12 +34,15 @@ public GenericErrorController(ErrorAttributes errorAttributes) {
     this.errorAttributes = errorAttributes;
   }
 
-  @RequestMapping(value = "/error")
+  @RequestMapping(value = "${server.error.path:/error}")
   public Map error(
       @RequestParam(value = "trace", defaultValue = "false") Boolean includeStackTrace,
       WebRequest webRequest) {
-    Map<String, Object> attributes =
-        errorAttributes.getErrorAttributes(webRequest, includeStackTrace);
+    ErrorAttributeOptions options =
+        includeStackTrace
+            ? ErrorAttributeOptions.defaults().including(ErrorAttributeOptions.Include.STACK_TRACE)
+            : ErrorAttributeOptions.defaults();
+    Map<String, Object> attributes = errorAttributes.getErrorAttributes(webRequest, options);
 
     Throwable exception = errorAttributes.getError(webRequest);
     if (exception != null && exception instanceof HasAdditionalAttributes) {
@@ -47,9 +51,4 @@ public Map error(
 
     return attributes;
   }
-
-  @Override
-  public String getErrorPath() {
-    return "/error";
-  }
 }