contrib/tzdata: import tzdata 2022b and 2022c
Changes: https://github.com/eggert/tz/blob/2022b/NEWS
Changes: https://github.com/eggert/tz/blob/2022c/NEWS
The tzdata2022b import restored the zoneinfo/GMT link.
Don't delete it again with 'make delete-old'.
(cherry picked from commit 9f9fc6bb8028ea29da6b04c338c750cedc3040f3)
(cherry picked from commit f5d5282cf7d1181f933626dcdc3525db0d70a266)
(cherry picked from commit 5f33eb7266f938857ce2fc9ea59679ea46a0694b)