Update to use a standard organization variable

I noticed from another PR that we are using `ORG_NAME` for generic
organization variables. This commit updates all the queries to use
`ORG_NAME` instead of `ORGANIZATION_SLUG` to be consistent with the rest
of the codebase.

Author: jusuchin85

graphql/queries/org-branches-and-commits-by-repository.graphql

@@ -1,5 +1,5 @@
 query getCommitsByBranchByRepo {
-  organization(login: "ORGANIZATION_SLUG") {
+  organization(login: "ORG_NAME") {
     name
     repository(name: "REPO_NAME") {
       name

graphql/queries/org-get-ip-allow-list.graphql

@@ -5,7 +5,7 @@
 # - The IP allow list for GitHub Apps enabled setting
 
 query GetOrganizationIPAllowList {
-    organization(login: "ORGANIZATION_SLUG") {
+    organization(login: "ORG_NAME") {
         owner_id: id
         organization_slug: login
         is_ip_allow_list_enabled: ipAllowListEnabledSetting

graphql/queries/org-members-by-team.graphql

@@ -1,5 +1,5 @@
 query getMembersByTeam {
-  organization(login: "ORGANIZATION_SLUG") {
+  organization(login: "ORG_NAME") {
     id
     name
     teams(first: 1, query: "TEAM_NAME") {

graphql/queries/org-pr-merged-info-by-repository.graphql

@@ -1,5 +1,5 @@
 query getRepoMergedPRDetails {
-  repository(owner: "ORGANIZATION_SLUG, name: "REPO_NAME") {
+  repository(owner: "ORG_NAME, name: "REPO_NAME") {
     pullRequests(first: 100, states: MERGED) {
       pageInfo {
 				endCursor #use this value in the pullRequests argument list

graphql/queries/org-repos-fragment-directive-2.graphql

@@ -1,5 +1,5 @@
 query orgInfo($showRepoInfo: Boolean!) {
-    organization(login: "ORGANIZATION_SLUG") {
+    organization(login: "ORG_NAME") {
         ...orgFrag
     }
 }

graphql/queries/org-repos-fragment-directive.graphql

@@ -1,5 +1,5 @@
 query orgInfo($showRepoInfo: Boolean!) {
-    organization(login: "ORGANIZATION_SLUG") {
+    organization(login: "ORG_NAME") {
         login
         name
         repositories @include(if: $showRepoInfo) {

graphql/queries/repo-get-all-branches.graphql

@@ -1,5 +1,5 @@
 query getExistingRepoBranches {
-  organization(login: "ORGANIZATION_SLUG") {
+  organization(login: "ORG_NAME") {
     repository(name: "REPO_NAME") {
       id
       name

graphql/queries/repos-get-last-issue-comment.graphql

@@ -1,5 +1,5 @@
 query getRepoIssue {
-  repository(owner: "ORGANIZATION_SLUG", name: "REPO_NAME") {
+  repository(owner: "ORG_NAME", name: "REPO_NAME") {
     issues(last: 1) {
       edges {
         node {