cli: add -B,--bank= option to flux submission commands

Problem: Users are forced to use --setattr=bank=BANK to set a bank
attribute in their jobspec, but this is an attribute documented
in RFC 14 and is commonly required in production system instance
usage.

Add a `-B,--bank=` to all flux submission cli commands to make
use of banks more user friendly.

Author: ilumsden

src/bindings/python/flux/cli/base.py

@@ -757,6 +757,13 @@ def create_parser(
             description=description,
             formatter_class=flux.util.help_formatter(),
         )
+        parser.add_argument(
+            "-B",
+            "--bank",
+            type=str,
+            metavar="BANK",
+            help="Submit a job to a specific named bank",
+        )
         parser.add_argument(
             "-q",
             "--queue",
@@ -1042,6 +1049,9 @@ def jobspec_create(self, args):
         if args.queue is not None:
             jobspec.setattr("system.queue", args.queue)
 
+        if args.bank is not None:
+            jobspec.setattr("system.bank", args.bank)
+
         if args.setattr is not None:
             for keyval in args.setattr:
                 key, val = parse_jobspec_keyval("--setattr", keyval)
@@ -1425,7 +1435,6 @@ def _progress_check(self, args):
             args.progress = None
 
     def watcher_start(self, args):
-
         if not self.watcher:
             #  Need to open self.flux_handle if it isn't already in order
             #  to start the watcher