Enable RPM to support Tast first class

Adding flags in the rpm category: frontendAddress,powerunitHostname,powerunitOutlet,hydraHostname.
Modify DutInfo struct and FillDUTInfo() to pass RPM information into Tast.

BUG=b:283137185
TEST=cq

Change-Id: I105c705a5f22fb931e906cfdd2c5f85495b34f31
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/4346873
Commit-Queue: Terry Yan <yichiyan@google.com>
Tested-by: Terry Yan <yichiyan@google.com>
Reviewed-by: Seewai Fu <seewaifu@google.com>
3 files changed