Added support for version 2.8 of the timescaleDB plugin.

Customer requested this functionality because this version fixes bugs like segfault in the compression process (#4577)

Environment information sent by the customer:

can you give the following informations to the validation team of Timescale 2.8 , some lines of errors in postgresql log :

abrt-server: Executable '/usr/pgsql-13/bin/postgres;631eea96' doesn't belong to any package and ProcessUnpackaged is set to 'no'
abrt-server: 'post-create' on '/var/spool/abrt/ccpp-2022-09-12-18:45:52-115869' exited with 1
abrt-server: Deleting problem directory '/var/spool/abrt/ccpp-2022-09-12-18:45:52-115869'
postgres[23976]: [8-1] 2022-09-12 18:45:59.675 CEST [23976] LOG: background worker "Compression Policy [1004]" (PID 115869) was terminated by signal 11: Segmentation fault
postgres[23976]: [9-1] 2022-09-12 18:45:59.676 CEST [23976] LOG: terminating any other active server processes
postgres[116058]: [10-1] 2022-09-12 18:45:59.676 CEST [116058] WARNING: terminating connection because of crash of another server process

.

postgres[116226]: [13-1] 2022-09-12 18:46:03.032 CEST [116226] FATAL: the database system is in recovery mode

postgres[116225]: [13-1] 2022-09-12 18:46:03.198 CEST [116225] LOG: database system was not properly shut down; automatic recovery in progress
postgres[116225]: [14-1] 2022-09-12 18:46:03.209 CEST [116225] LOG: redo starts at 23A68/BD263D40

postgres[116313]: [13-1] 2022-09-12 18:46:06.288 CEST [116313] FATAL: the database system is in recovery mode
postgres[23976]: [12-1] 2022-09-12 18:46:06.485 CEST [23976] LOG: database system is ready to accept connections
postgres[116320]: [12-1] 2022-09-12 18:46:06.488 CEST [116320] LOG: TimescaleDB background worker launcher connected to shared catalogs