build: Add stable pipeline [DEVOPS-119] (#9410)
build: Add stable pipeline [DEVOPS-119] (#9410)

* build: Add stable pipeline [DEVOPS-119]

* build: Enable slack failure notifications [DEVOPS-119]

* build: Update copy-war-s3 script URL [DEVOPS-119] [skip ci]
hispindia/dhis2-Core,msf-oca-his/dhis2-core,hispindia/dhis2-Core,hispindia/dhis2-Core,msf-oca-his/dhis2-core,dhis2/dhis2-core,msf-oca-his/dhis2-core,msf-oca-his/dhis2-core,hispindia/dhis2-Core,dhis2/dhis2-core,dhis2/dhis2-core,msf-oca-his/dhis2-core,hispindia/dhis2-Core,dhis2/dhis2-core,dhis2/dhis2-core