feat(core): Add "Client Credentials" grant type to OAuth2 (#3489)

* ⚡ Add OAuth2 client credentials grant type

* ⚡ Improvements

* 🐛 Fix linting issue

* 🐛 Fix typo

* 🐛 Fix small issue with type

* 🐛 When token expire get a new one instead of refreshing it

* ⚡ Fix issue that it did not display it correctly for OAuth1

Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>

packages/editor-ui/src/components/CredentialEdit/CredentialEdit.vue

@@ -299,9 +299,17 @@ export default mixins(showMessage, nodeHelpers).extend({
 		},
 		isOAuthType(): boolean {
 			return !!this.credentialTypeName && (
-				['oAuth1Api', 'oAuth2Api'].includes(this.credentialTypeName) ||
-				this.parentTypes.includes('oAuth1Api') ||
-				this.parentTypes.includes('oAuth2Api')
+				(
+					(
+						this.credentialTypeName === 'oAuth2Api' ||
+						this.parentTypes.includes('oAuth2Api')
+					) && this.credentialData.grantType === 'authorizationCode'
+				)
+				||
+				(
+					this.credentialTypeName === 'oAuth1Api' ||
+					this.parentTypes.includes('oAuth1Api')
+				)
 			);
 		},
 		isOAuthConnected(): boolean {