[chore] Add more labels to the labels action (open-telemetry#36344)

#### Description

To further empower code owners this PR adds support for managing more
labels.

.github/workflows/scripts/add-labels.sh

@@ -28,6 +28,14 @@ COMMON_LABELS["needs-triage"]="needs triage"
 COMMON_LABELS["os:mac"]="os:mac"
 COMMON_LABELS["os:windows"]="os:windows"
 COMMON_LABELS["waiting-for-author"]="waiting for author"
+COMMON_LABELS["waiting-for-code-owners"]="waiting-for-code-owners"
+COMMON_LABELS["bug"]="bug"
+COMMON_LABELS["priority:p0"]="priority:p0"
+COMMON_LABELS["priority:p1"]="priority:p1"
+COMMON_LABELS["priority:p2"]="priority:p2"
+COMMON_LABELS["priority:p3"]="priority:p3"
+COMMON_LABELS["stale"]="Stale"
+COMMON_LABELS["never-stale"]="never stale"
 
 LABELS=$(echo "${COMMENT}" | sed -E 's%^/label%%')
 

.github/workflows/scripts/ping-codeowners-issues.sh

@@ -20,4 +20,4 @@ if [[ -z "${OWNERS}" ]]; then
     exit 0
 fi
 
-gh issue comment "${ISSUE}" --body "Pinging code owners for ${COMPONENT}: ${OWNERS}. See [Adding Labels via Comments](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#adding-labels-via-comments) if you do not have permissions to add labels yourself."
+gh issue comment "${ISSUE}" --body "Pinging code owners for ${COMPONENT}: ${OWNERS}. See [Adding Labels via Comments](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#adding-labels-via-comments) if you do not have permissions to add labels yourself. For example, comment '/label priority:p2 -needs-triaged' to set the priority and remove the needs-triaged label."

CONTRIBUTING.md

@@ -342,16 +342,24 @@ In order to facilitate proper label usage and to empower Code Owners, you are ab
 
 The following general labels are supported:
 
-| Label                | Label in Comment     |
-|----------------------|----------------------|
-| `arm64`              | `arm64`              |
-| `good first issue`   | `good-first-issue`   |
-| `help wanted`        | `help-wanted`        |
-| `discussion needed`  | `discussion-needed`  |
-| `needs triage`       | `needs-triage`       |
-| `os:mac`             | `os:mac`             |
-| `os:windows`         | `os:windows`         |
-| `waiting for author` | `waiting-for-author` |
+| Label                     | Label in Comment          |
+|---------------------------|---------------------------|
+| `arm64`                   | `arm64`                   |
+| `good first issue`        | `good-first-issue`        |
+| `help wanted`             | `help-wanted`             |
+| `discussion needed`       | `discussion-needed`       |
+| `needs triage`            | `needs-triage`            |
+| `os:mac`                  | `os:mac`                  |
+| `os:windows`              | `os:windows`              |
+| `waiting for author`      | `waiting-for-author`      |
+| `waiting-for-code-owners` | `waiting-for-code-owners` |
+| `bug`                     | `bug`                     |
+| `priority:p0`             | `priority:p0`             |
+| `priority:p1`             | `priority:p1`             |
+| `priority:p2`             | `priority:p2`             |
+| `priority:p3`             | `priority:p3`             |
+| `Stale`                   | `stale`                   |
+| `never stale`             | `never-stale`             |
 
 To delete a label, prepend the label with `-`. Note that you must make a new comment to modify labels; you cannot edit an existing comment.