Set language in JSON renderer (SARIF format)

[ericwb]

Describe the bug
The JSON renderer, renders in SARIF format which supports a language attribute to signal what locale the strings are translated into.

To Reproduce

• Run a analysis with a non-English locale and --json arg.
• Examine the SARIF output with regards to strings
• Notice there is no indication of the language identifier

Expected behavior
Metadata to indicate the translated language should be included in the SARIF output.

Version
0.8.0

Additional context
https://docs.oasis-open.org/sarif/sarif/v2.0/csprd02/sarif-v2.0-csprd02.html#_Toc10127682