fix: Allow to remove a ThreadLocalAccessor by Key of Type Object

The `ThreadLocalAccessor.key()` is of Type Object. Thus, when it comes to delete a predefined `ThreadLocalAccessor` which have a non-String key, it's becomes impossible to delete.
This behavior was observed while attempting to remove `org.springframework.security.core.context.ReactiveSecurityContextHolderThreadLocalAccessor` from the `ContextRegistry`, which have a key of type `java.lang.Class`.

This change will add a dedicated method to allow deleting a `ThreadLocalAccessor` identified by its key of type `java.lang.Object`.

Signed-off-by: Boubaker Khanfir <[email protected]>

Author: boubaker

context-propagation/src/main/java/io/micrometer/context/ContextRegistry.java

@@ -149,8 +149,14 @@ public ContextRegistry registerThreadLocalAccessor(ThreadLocalAccessor<?> access
      * Removes a {@link ThreadLocalAccessor}.
      * @param key under which the accessor got registered
      * @return {@code true} when accessor got successfully removed
+     * @deprecated use {@link ContextRegistry#removeThreadLocalAccessorForKey(Object)} instead
      */
+     @Deprecated(since = "1.1", forRemoval = true)
     public boolean removeThreadLocalAccessor(String key) {
+        return removeThreadLocalAccessorForKey(key);
+    }
+
+    public boolean removeThreadLocalAccessorForKey(Object key) {
         for (ThreadLocalAccessor<?> existing : this.threadLocalAccessors) {
             if (existing.key().equals(key)) {
                 return this.threadLocalAccessors.remove(existing);