BigQuery and AdswerveBigQuery uses a service account in the working directory

[loicmathieu]

Expected Behavior

BigQuery and AdswerveBigQuery uses a service account in the working directory which may not e compatible with all task runner.
We need to find another away.

Actual Behaviour

See https://github.com/kestra-io/plugin-singer/blob/master/src/main/java/io/kestra/plugin/singer/targets/AdswerveBigQuery.java#L157 and https://github.com/kestra-io/plugin-singer/blob/master/src/main/java/io/kestra/plugin/singer/taps/BigQuery.java#L118

Steps To Reproduce

No response

Environment Information

• Kestra Version:
• Plugin version:
• Operating System (OS / Docker / Kubernetes):
• Java Version (If not docker):

Example flow

No response