Add release contributor script (open-telemetry#5207)

* Add release contributor script

* Feedback

.github/scripts/generate-release-contributors.sh

@@ -0,0 +1,82 @@
+#!/bin/bash -e
+
+# shellcheck disable=SC2016
+# shellcheck disable=SC2086
+
+from_version=$1
+to_version=$2
+
+# get the date of the first commit on main that wasn't in the from_version
+from=$(git log --reverse --pretty=format:"%cI" $from_version..HEAD | head -1)
+
+# get the last commit on main that was in the to_version
+to=$(git merge-base HEAD $to_version | xargs git log -1 --pretty=format:"%cI")
+
+contributors1=$(gh api graphql --paginate -F q="repo:open-telemetry/opentelemetry-java-instrumentation is:pr base:main is:merged merged:$from..$to" -f query='
+query($q: String!, $endCursor: String) {
+  search(query: $q, type: ISSUE, first: 100, after: $endCursor) {
+    edges {
+      node {
+        ... on PullRequest {
+          author { login }
+          reviews(first: 100) {
+            nodes {
+              author { login }
+            }
+          }
+          comments(first: 100) {
+            nodes {
+              author { login }
+            }
+          }
+          closingIssuesReferences(first: 100) {
+            nodes {
+              author { login }
+            }
+          }
+        }
+      }
+    }
+    pageInfo {
+      hasNextPage
+      endCursor
+    }
+  }
+}' --jq '.data.search.edges.[].node.author.login,
+       .data.search.edges.[].node.reviews.nodes.[].author.login,
+       .data.search.edges.[].node.comments.nodes.[].author.login,
+       .data.search.edges.[].node.closingIssuesReferences.nodes.[].author.login')
+
+# this query captures authors of issues which have had PRs in the current range reference the issue
+# but not necessarily through closingIssuesReferences (e.g. addressing just a part of an issue)
+contributors2=$(gh api graphql --paginate -F q="repo:open-telemetry/opentelemetry-java-instrumentation is:pr base:main is:merged merged:$from..$to" -f query='
+query($q: String!, $endCursor: String) {
+  search(query: $q, type: ISSUE, first: 100, after: $endCursor) {
+    edges {
+      node {
+        ... on PullRequest {
+          body
+        }
+      }
+    }
+    pageInfo {
+      hasNextPage
+      endCursor
+    }
+  }
+}
+' --jq '.data.search.edges.[].node.body' \
+  | grep -oE "#[0-9]{4,}|issues/[0-9]{4,}" \
+  | grep -oE "[0-9]{4,}" \
+  | xargs -I{} gh issue view {} --json 'author,url' --jq '[.author.login,.url]' \
+  | grep -v '/pull/' \
+  | sed 's/^\["//' \
+  | sed 's/".*//')
+
+echo $contributors1 $contributors2 \
+  | sed 's/ /\n/g' \
+  | sort -uf \
+  | grep -v linux-foundation-easycla \
+  | grep -v github-actions \
+  | grep -v dependabot \
+  | sed 's/^/@/'