feat(executions): allow suspending an execution at a breakpoint

- When creating an execution, you can pass a breakpoint of the form `taskId.value` and an execution kind.
- An execution with a breakpoint will be suspended in the `BREAKPOINT` state when arriving at the point where the breakpoint task should be executed
- You can resume an execution from a breakpoint, this would resume the execution and remove the existing breakpoint. At this time a new breakpoint can be passed.
- You can pass a breakpoint when replaying an execution.

Part-of: https://github.com/kestra-io/kestra-ee/issues/1547

jdbc-h2/src/main/resources/migrations/h2/V1_40__execution_breakpoint.sql

@@ -0,0 +1,17 @@
+ALTER TABLE executions ALTER COLUMN "state_current" ENUM (
+    'CREATED',
+    'RUNNING',
+    'PAUSED',
+    'RESTARTED',
+    'KILLING',
+    'SUCCESS',
+    'WARNING',
+    'FAILED',
+    'KILLED',
+    'CANCELLED',
+    'QUEUED',
+    'RETRYING',
+    'RETRIED',
+    'SKIPPED',
+    'BREAKPOINT'
+) NOT NULL GENERATED ALWAYS AS (JQ_STRING("value", '.state.current'));