bug(workers): Create worker-led panics on invalid token

[irenarindos]

Fix panic if invalid token is passed:

% boundary workers create worker-led -worker-generated-auth-token=bogus
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x2 addr=0x8 pc=0x10533ce24]

goroutine 1 [running]:
github.com/hashicorp/boundary/internal/cmd/commands/workerscmd.executeExtraWorkerLedActionsImpl(0x14000b6cfc0?, 0x0?, 0x10535e532?, {0x0?, 0x0?}, 0x18?, 0xc0fb18?, {0x0?, 0x14000c0fb88?, 0x1044c4f20?})
	/boundary/internal/cmd/commands/workerscmd/worker-led_funcs.go:67 +0x84

[louisruch]

Mind updating the same error here https://github.com/hashicorp/boundary/blob/main/internal/cmd/commands/authmethodscmd/oidc_funcs.go#L294

[louisruch]

LGTM