Fix export for transaction rules with condition 'amount_equals'
See error in https://community.kresus.org/t/mise-a-jour-solde-lbp/374/7:
Error
at panic (/opt/kresus/node_modules/kresus/build/server/helpers.js:31:46)
at assert (/opt/kresus/node_modules/kresus/build/server/helpers.js:38:9)
at cleanData (/opt/kresus/node_modules/kresus/build/server/controllers/helpers.js:112:42)
at getAllData (/opt/kresus/node_modules/kresus/build/server/controllers/all.js:93:39)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async export_ (/opt/kresus/node_modules/kresus/build/server/controllers/all.js:158:22)
[2023-04-10T22:55:19.893] [ERROR] helpers - when exporting data: Assertion error: unhandled transaction rule condition in exports cleanup