tenctl provides several useful native functions. This introduces these
native functions to jsonnet-tool.

Once this change is introduced, tenctl will be updated to import these
functions instead of providing it's own.

This will ensure consistency across our jsonnet tooling.

This disables the magic number detector, the violations on this
codebase at the time:

<There was a nicely list of the offences this hides. It was supported
by all git clients and forges that I know of, but still there was
another linter complaining so it's gone now.>

The golangci-lint failures where:
https://gitlab.com/gitlab-com/gl-infra/jsonnet-tool/-/jobs/6813661179

So mostly exit codes and documented variables. I don't think this
linter adds enough value.

chore(deps): update golangci-lint-minor to v1.58.1

See merge request !142

feat: consistent natives across Jsonnet tooling

See merge request !140