Add Cloudshell support

[roroco]

• Pickup version of fn go with support for cloudshell provider
• Read oci cli auth environment variable to determine what oracle provider to use

[roroco]

Addressed comments.

[srpurani]

OracleCSProvider is driven by OCI Auth variable. Would be ideal to separate signing mechanics from CS specific default logic.

[roroco]

OracleCSProvider is driven by OCI Auth variable. Would be ideal to separate signing mechanics from CS specific default logic.

I think we can reorganize when there is a case where the token is available outside of a cloudshell environment. But to do so later, we probably need to expand the criteria for when the cloudshell provider is chosen as the default provider i.e. use not just the value of oci_cli_auth but additional environment specific properties.

[srpurani]

OracleCSProvider is driven by OCI Auth variable. Would be ideal to separate signing mechanics from CS specific default logic.

I think we can reorganize when there is a case where the token is available outside of a cloudshell environment. But to do so later, we probably need to expand the criteria for when the cloudshell provider is chosen as the default provider i.e. use not just the value of oci_cli_auth but additional environment specific properties.

Makes sense, we can refactor this when the need arises.

[srpurani]

LGTM.