PMM-15241: Restore update popup snooze using UI-owned duration after settings field removal

[mattiasimonato]

https://jira.percona.com/browse/PMM-15241

• PMM-15241: Restore update popup snooze using UI-owned duration after settings field removal percona/pmm#5694

QA: localStorage snooze override

For QA only. Default snooze is still 7 days. To test expiry without waiting:

localStorage.setItem('pmm-ui.dev.updateSnoozeDurationMs', '10000'); // 10s
// Remind me later → wait >10s → refresh → popup should show again
localStorage.removeItem('pmm-ui.dev.updateSnoozeDurationMs'); // reset

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4496-dce619c
Client docker: perconalab/pmm-client-fb:PR-4496-dce619c
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4496-dce619c
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4496-dce619c.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4496-dce619c&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4496-dce619c.tar.gz

[JNKPercona]

API tests have succeded: https://pmm.cd.percona.com/job/pmm3-api-tests/6866/

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4496-95b246c
Client docker: perconalab/pmm-client-fb:PR-4496-95b246c
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4496-95b246c
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4496-95b246c.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4496-95b246c&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4496-95b246c.tar.gz

[JNKPercona]

API tests have succeded: https://pmm.cd.percona.com/job/pmm3-api-tests/6871/

[JNKPercona]

Server docker: perconalab/pmm-server-fb:PR-4496-e687828
Client docker: perconalab/pmm-client-fb:PR-4496-e687828
Watchtower docker: perconalab/pmm-watchtower-fb:PR-4496-e687828
Client tarball: https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4496-e687828.tar.gz
Staging instance: https://pmm.cd.percona.com/job/pmm3-aws-staging-start/parambuild/?DOCKER_VERSION=perconalab/pmm-server-fb:PR-4496-e687828&CLIENT_VERSION=https://s3.us-east-2.amazonaws.com/pmm-build-cache/PR-BUILDS/pmm-client/pmm-client-PR-4496-e687828.tar.gz

[JNKPercona]

API tests have succeded: https://pmm.cd.percona.com/job/pmm3-api-tests/6877/