fix(ci): add exclusions in .lint file

.lint

@@ -1,3 +1,7 @@
 exclusions:
  template-job-rule:
  panel-job-instance-rule:
+ template-datasource-rule:
+  reason: CI failing because label has different caps, this was changed in grafana-builder
+ panel-datasource-rule:
+  reason: The new Grafonnet promotes the use of datasources at the query level. This should probably end up in the linter as a valid option.

Makefile

@@ -57,8 +57,6 @@ $(OUT_DIR)/.lint: $(OUT_DIR)
 dashboards-lint: $(GRAFANA_DASHBOARD_LINTER_BIN) $(OUT_DIR)/.lint
 	# Replace $$interval:$$resolution var with $$__rate_interval to make dashboard-linter happy.
 	@sed -i -e 's/$$interval:$$resolution/$$__rate_interval/g' $(OUT_DIR)/*.json
-	# Replace 'Data source' label with 'Data Source' to make dashboard-linter happy.
-	@sed -i -e 's/Data source/Data Source/g' $(OUT_DIR)/*.json
 	@find $(OUT_DIR) -name '*.json' -print0 | xargs -n 1 -0 $(GRAFANA_DASHBOARD_LINTER_BIN) lint --strict