pgf: added reward distribution limit for stewards #7097

Job	Run time
build-wasm (ubuntu-latest, v2, 2.4.0)	4m 49s
namada-release (ubuntu-latest, 2.4.0, ABCI Release build)	12m 9s
test-unit (ubuntu-latest, nightly-2023-06-01, 2.4.0, ABCI)	22m 28s
test-integration (ubuntu-latest, nightly-2023-06-01, 2.4.0, ABCI)	6m 31s
test-wasm (ubuntu-latest, v2, nightly-2023-06-01, 2.4.0)	8m 33s
run-benchmarks (ubuntu-latest, nightly-2023-06-01, 2.4.0, ABCI)	29m 58s
upload-wasm (ubuntu-latest, v2, nightly-2023-06-01, 2.4.0)	16s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta7, 0)	17m 25s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta7, 1)	18m 39s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta7, 2)	14m 50s
namada-e2e (ubuntu-latest, nightly-2023-06-01, 2.4.0, 0.37.2, 1.7.4-namada-beta7, 3)	18m 30s
	2h 34m 8s

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