data/excluded: batch add 3 excluded reports

Adds excluded reports:
	- data/excluded/GO-2023-2392.yaml
	- data/excluded/GO-2023-2391.yaml
	- data/excluded/GO-2023-2390.yaml

Fixes golang/vulndb#2392
Fixes golang/vulndb#2391
Fixes golang/vulndb#2390

Change-Id: Ic98a4d0e1e98779a7500ec9c940dc337b86a05e1
Reviewed-on: https://go-review.googlesource.com/c/vulndb/+/549240
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Damien Neil <dneil@google.com>
diff --git a/data/excluded/GO-2023-2390.yaml b/data/excluded/GO-2023-2390.yaml
new file mode 100644
index 0000000..e396fb9
--- /dev/null
+++ b/data/excluded/GO-2023-2390.yaml
@@ -0,0 +1,8 @@
+id: GO-2023-2390
+excluded: EFFECTIVELY_PRIVATE
+modules:
+    - module: github.com/mattermost/mattermost/server/v8
+cves:
+    - CVE-2023-6459
+ghsas:
+    - GHSA-63cv-4pc2-4fcf
diff --git a/data/excluded/GO-2023-2391.yaml b/data/excluded/GO-2023-2391.yaml
new file mode 100644
index 0000000..f9e5ebd
--- /dev/null
+++ b/data/excluded/GO-2023-2391.yaml
@@ -0,0 +1,8 @@
+id: GO-2023-2391
+excluded: EFFECTIVELY_PRIVATE
+modules:
+    - module: github.com/mattermost/mattermost
+cves:
+    - CVE-2023-6458
+ghsas:
+    - GHSA-7664-hcp7-f497
diff --git a/data/excluded/GO-2023-2392.yaml b/data/excluded/GO-2023-2392.yaml
new file mode 100644
index 0000000..9d4acc0
--- /dev/null
+++ b/data/excluded/GO-2023-2392.yaml
@@ -0,0 +1,6 @@
+id: GO-2023-2392
+excluded: EFFECTIVELY_PRIVATE
+modules:
+    - module: knative.dev/eventing-gitlab
+ghsas:
+    - GHSA-99jv-8292-2hpm