res/res_ari: Add additional hangup reasons

The ARI DELETE /channels command takes a "reason" parameter
Previously, there were only five reasons implemented
This patch adds more reasons to choose from for more
complex setups

ASTERISK-28198 #close

Change-Id: I85996f1076c9946d65c778413f040a845a90fecc

rest-api/api-docs/channels.json

@@ -421,6 +421,14 @@
 									"busy",
 									"congestion",
 									"no_answer",
+									"timeout",
+									"rejected",
+									"unallocated",
+									"normal_unspecified",
+									"number_incomplete",
+									"codec_mismatch",
+									"interworking",
+									"failure",
 									"answered_elsewhere"
 								]
 							}