fw engprod tools: graduate from provingground

Move utilities for which cros-fw-te@ intends to pay the
maintenance cost out of the provingground.

Additionally, adds a README, and applies the directory
structure described at:
https://www.chromium.org/chromium-os/developer-guide/go-in-chromium-os

BUG=None (for more context, see go/cros-fw-engprod-tools)
TEST=None

Change-Id: I34320248a7d2ff6e7c80bfe7ef17c0ab6d974025
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crostestutils/+/1958749
Tested-by: Kevin Shelton <kmshelton@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: Greg Edelston <gredelston@google.com>
Reviewed-by: Katherine Threlkeld <kathrelkeld@chromium.org>
Commit-Queue: Kevin Shelton <kmshelton@chromium.org>
diff --git a/go/src/firmware/OWNERS b/go/src/firmware/OWNERS
new file mode 100644
index 0000000..0b5dad8
--- /dev/null
+++ b/go/src/firmware/OWNERS
@@ -0,0 +1,3 @@
+dgoyette@chromium.org
+gredelston@chromium.org
+kmshelton@chromium.org
diff --git a/go/src/firmware/README.md b/go/src/firmware/README.md
new file mode 100644
index 0000000..df2e40f
--- /dev/null
+++ b/go/src/firmware/README.md
@@ -0,0 +1,6 @@
+# Firmware EngProd Tools
+
+* fw_e2e_coverage_summarizer: Used to generate firmware coverage reports (if demonstrating sufficient value, this utility will eventually be generalized to other, non-firmware test areas).
+* fw_lab_triage_helper: Used to surface information that is useful for isolating problems during triage of firmware lab test results.
+
+Maintainers contact: cros-fw-te@google.com
diff --git a/provingground/firmware/fw_e2e_coverage_summarizer.go b/go/src/firmware/fw_e2e_coverage_summarizer.go
similarity index 100%
rename from provingground/firmware/fw_e2e_coverage_summarizer.go
rename to go/src/firmware/fw_e2e_coverage_summarizer.go
diff --git a/provingground/firmware/fw_lab_triage_helper.go b/go/src/firmware/fw_lab_triage_helper.go
similarity index 100%
rename from provingground/firmware/fw_lab_triage_helper.go
rename to go/src/firmware/fw_lab_triage_helper.go