Support scheduling Cloud Agent on master nodes

[DebakelOrakel]

Checklist

• [x] The PR has a meaningful title. It will be used to auto generate the changelog. The PR has a meaningful description that sums up the change. It will be linked in the changelog.
• [x] PR contains a single logical change (to build a better changelog).
• [x] Update the documentation.
• [x] Categorize the PR by adding one of the labels: bug, enhancement, documentation, change, breaking, dependency as they show up in the changelog.
• [ ] Link this PR to related issues or PRs.

[DebakelOrakel]

@simu Do you by chance have insight, what jsonnet linter is unhappy whit?

[simu]

@simu Do you by chance have insight, what jsonnet linter is unhappy whit?

make format spits out the following diff:

diff --git a/component/main.jsonnet b/component/main.jsonnet
index fa73d86..1672148 100644
--- a/component/main.jsonnet
+++ b/component/main.jsonnet
@@ -10,7 +10,7 @@ local params = inv.parameters.appuio_cloud;
 local isOpenshift = std.startsWith(inv.parameters.facts.distribution, 'openshift');
 local namespaceLabels = (
   if isOpenshift then { 'openshift.io/cluster-monitoring': 'true' }
-  else { 'SYNMonitoring': 'main' }
+  else { SYNMonitoring: 'main' }
 ) + params.namespaceLabels;
 local namespaceAnnotations = (
   if isOpenshift then { 'openshift.io/node-selector': '' }