Add OpenBao JWT role setup to GDK configure

Why are we doing this work

The following discussion from !180249 (merged) should be addressed:

• @iamricecake started a discussion: (+2 comments)

  @dbiryukov @cipherboy-gitlab in !180249 (merged), I had to manually setup the JWT role manually and the related policy. I think we should automatically do this when we do gdk bao configure. What do you think?

Relevant links

• !180249 (merged)
• !180249 (comment 2339850967)

Implementation plan

• Ensure running gdk bao configure implements the JWT role and related policies as documented here.

Verification steps

• Ensure the queries and mutations in the associated MR work out of the box after running gdk bao configure.