Add Bitbucket Cloud OAuth support

Signed-off-by: Jake Smith <jakemgsmith@gmail.com>

docs/integrations/bitbucketCloud/locations.md

@@ -32,6 +32,15 @@ integrations:
       appPassword: my-password
 ```
 
+OAuth 2.0 client credentials flow:
+
+```yaml
+integrations:
+  bitbucketCloud:
+    - clientId: client-id
+      clientSecret: client-secret
+```
+
 :::note Note
 
 A public Bitbucket Cloud provider is added automatically at startup for
@@ -41,7 +50,7 @@ convenience, so you only need to list it if you want to supply credentials.
 
 :::note Note
 
-The credential required for this type is either an [Api token](https://support.atlassian.com/bitbucket-cloud/docs/using-api-tokens/) or an [App Password](https://support.atlassian.com/bitbucket-cloud/docs/app-passwords/). An Atlassian Account API key will not work.
+The credential required for this type is either an [Api token](https://support.atlassian.com/bitbucket-cloud/docs/using-api-tokens/), an [App Password](https://support.atlassian.com/bitbucket-cloud/docs/app-passwords/) or an [OAuth 2.0 client credentials](https://support.atlassian.com/bitbucket-cloud/docs/use-oauth-on-bitbucket-cloud/). An Atlassian Account API key will not work.
 
 :::
 
@@ -55,3 +64,5 @@ This one entry will have the following elements:
   neither a username nor token are supplied, anonymous access will be used.
 - `token`: The token used to authenticate requests.
 - `appPassword`: The app password for the Bitbucket Cloud user.
+- `clientId`: The OAuth client ID for Bitbucket Cloud (used with `clientSecret` for OAuth 2.0 client credentials flow).
+- `clientSecret`: The OAuth client secret for Bitbucket Cloud (used with `clientId` for OAuth 2.0 client credentials flow).