refactor: deprecate `CodeIgniter\HTTP\ContentSecurityPolicy::$nonces` since never used #14151

Job	Run time
Setup PHP Version for Code Coverage	3s
Others (8.5) / Sanity Tests	2m 37s
Others (8.2) / Sanity Tests	3m 52s
Others (8.4) / Sanity Tests	2m 39s
Others (8.3) / Sanity Tests	2m 30s
CacheLive (8.5) / Cache Live Tests	2m 11s
SeparateProcess (8.2) / tests	3m 57s
CacheLive (8.2) / Cache Live Tests	2m 40s
CacheLive (8.4) / Cache Live Tests	2m 17s
SeparateProcess (8.4) / tests	3m 31s
SeparateProcess (8.3) / tests	3m 50s
CacheLive (8.3) / Cache Live Tests	2m 9s
SeparateProcess (8.5) / tests	3m 29s
DatabaseLive (8.5, OCI8, 8.0) / tests	6m 58s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 43s
DatabaseLive (8.5, Postgre, 8.0) / tests	2m 53s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 40s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 45s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 43s
DatabaseLive (8.4, MySQLi, 8.0) / tests	4m 21s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 58s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 20s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	6m 12s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 9s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 30s
DatabaseLive (8.5, MySQLi, 8.0) / tests	4m 29s
DatabaseLive (8.2, MySQLi, 5.7) / tests	3m 44s
DatabaseLive (8.3, Postgre, 8.0) / tests	3m 10s
DatabaseLive (8.5, SQLite3, 8.0) / tests	4m 26s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 39s
DatabaseLive (8.2, MySQLi, 8.0) / tests	5m 23s
DatabaseLive (8.4, Postgre, 8.0) / tests	2m 56s
DatabaseLive (8.5, SQLSRV, 8.0) / tests	5m 46s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 26s
Upload coverage results to Coveralls / coveralls	49s
	2h 15m 45s

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