Update golang version for telemetry build in sonic-slave-jessie to fix CVE-2021-33195, this PR will be merged into 201911 branch finally.
#### Why I did it
Go before 1.15.13 and 1.16.x before 1.16.5 has functions for DNS lookups that do not validate replies from DNS servers, and thus a return value may contain an unsafe injection (e.g., XSS) that does not conform to the RFC1035 format. Now in 201911 and 202012 branch we're using 1.14.2
##### Work item tracking
- Microsoft ADO **(number only)**:17727291
#### How I did it
Bump golang version into 1.15.15 which contains corresponding fix.
#### How to verify it
unit test to do sanity check.
46c0d073a5