[DOP-29557] Raise proper error if Keycloak token is malformed #1505

Job	Run time
Oracle tests / Run Oracle tests	8m 26s
Clickhouse tests / Run Clickhouse tests	6m 9s
MySQL tests / Run MySQL tests	7m 48s
FTPS tests / Run FTPS tests	7m 41s
Scheduler tests / Run Scheduler tests	5m 43s
HDFS tests / Run HDFS tests	11m 44s
Iceberg tests / Run Iceberg tests	9m 5s
S3 tests / Run S3 tests	12m 7s
Unit tests / Run unit tests	5m 50s
Samba tests / Run Samba tests	8m 1s
WebDAV tests / Run WebDAV tests	8m 25s
Hive tests / Run Hive tests	8m 10s
SFTP tests / Run SFTP tests	9m 13s
MSSQL tests / Run MSSQL tests	7m 22s
FTP tests / Run FTP tests	9m 59s
Tests done	-1s
	2h 5m 42s

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