Updates azure.yaml schema to support single or multi hook configuration

[wbreza]

Updates azure.yaml schema to support both single and multi-hook configuration

Important

Should not merge till release day since schema updates are not managed as part of the release.

Supports single hook per event (legacy)

name: test-proj
services:
    api:
        project: src/api
        host: containerapp
        language: ts
        hooks:
            postprovision:
                shell: sh
                run: scripts/postprovision.sh
hooks:
    postprovision:
        shell: sh
        run: scripts/postprovision.sh

Supports multiple hooks per event (new)

name: test-proj
services:
    api:
        project: src/api
        host: containerapp
        language: ts
        hooks:
            postprovision:
                - shell: sh
                  run: scripts/postprovision1.sh
                - shell: sh
                  run: scripts/postprovision2.sh
hooks:
    postprovision:
        - shell: sh
          run: scripts/postprovision1.sh
        - shell: sh
          run: scripts/postprovision2.sh

[wbreza]

/check-enforcer override