feat(core): flow SLA

[loicmathieu]

Fixes #5857

First WIP draft prototype, still a lot of work to do.

Example flow:

id: sla
namespace: company.team

inputs:
  - id: string
    type: SELECT
    values:
      - PASS
      - CANCEL
    defaults: PASS

sla:
  - id: maxDuration
    type: MAX_DURATION
    behavior: FAIL
    duration: PT2S
  - id: condition
    type: EXECUTION_CONDITION
    behavior: CANCEL
    condition: "{{inputs.string == 'CANCEL'}}"
 
tasks:
  - id: sleep1
    type: io.kestra.plugin.core.flow.Sleep
    duration: PT1S
  - id: sleep2
    type: io.kestra.plugin.core.flow.Sleep
    duration: PT1S
  - id: sleep3
    type: io.kestra.plugin.core.flow.Sleep
    duration: PT1S

[sonarcloud]

Quality Gate failed

Failed conditions
27.3% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud